feat: add single player snake mode

Add solo mode where players survive as long as possible while tracking
score (food eaten). Single player games start with a shorter 3-second
countdown vs 10 seconds for multiplayer, maintain exactly 1 food item
for classic snake feel, and end when the player dies rather than when
one player remains.

- Add GameMode type (ModeMultiplayer/ModeSinglePlayer) and Score field
- Filter single player games from "Join a Game" lobby list
- Show "Ready?" and "Score: X" UI for single player mode
- Hide invite link for single player games
- Preserve game mode on rematch

db/gen/games.sql.go

@@ -13,7 +13,7 @@ import (
 const createGame = `-- name: CreateGame :one
 INSERT INTO games (id, board, current_turn, status)
 VALUES (?, ?, ?, ?)
-RETURNING id, board, current_turn, status, winner_user_id, winning_cells, created_at, updated_at, rematch_game_id, game_type, grid_width, grid_height, max_players
+RETURNING id, board, current_turn, status, winner_user_id, winning_cells, created_at, updated_at, rematch_game_id, game_type, grid_width, grid_height, max_players, game_mode, score
 `
 
 type CreateGameParams struct {
@@ -45,6 +45,8 @@ func (q *Queries) CreateGame(ctx context.Context, arg CreateGameParams) (Game, e
 		&i.GridWidth,
 		&i.GridHeight,
 		&i.MaxPlayers,
+		&i.GameMode,
+		&i.Score,
 	)
 	return i, err
 }
@@ -85,7 +87,7 @@ func (q *Queries) DeleteGame(ctx context.Context, id string) error {
 }
 
 const getActiveGames = `-- name: GetActiveGames :many
-SELECT id, board, current_turn, status, winner_user_id, winning_cells, created_at, updated_at, rematch_game_id, game_type, grid_width, grid_height, max_players FROM games WHERE game_type = 'connect4' AND status < 2
+SELECT id, board, current_turn, status, winner_user_id, winning_cells, created_at, updated_at, rematch_game_id, game_type, grid_width, grid_height, max_players, game_mode, score FROM games WHERE game_type = 'connect4' AND status < 2
 `
 
 func (q *Queries) GetActiveGames(ctx context.Context) ([]Game, error) {
@@ -111,6 +113,8 @@ func (q *Queries) GetActiveGames(ctx context.Context) ([]Game, error) {
 			&i.GridWidth,
 			&i.GridHeight,
 			&i.MaxPlayers,
+			&i.GameMode,
+			&i.Score,
 		); err != nil {
 			return nil, err
 		}
@@ -126,7 +130,7 @@ func (q *Queries) GetActiveGames(ctx context.Context) ([]Game, error) {
 }
 
 const getGame = `-- name: GetGame :one
-SELECT id, board, current_turn, status, winner_user_id, winning_cells, created_at, updated_at, rematch_game_id, game_type, grid_width, grid_height, max_players FROM games WHERE id = ?
+SELECT id, board, current_turn, status, winner_user_id, winning_cells, created_at, updated_at, rematch_game_id, game_type, grid_width, grid_height, max_players, game_mode, score FROM games WHERE id = ?
 `
 
 func (q *Queries) GetGame(ctx context.Context, id string) (Game, error) {
@@ -146,6 +150,8 @@ func (q *Queries) GetGame(ctx context.Context, id string) (Game, error) {
 		&i.GridWidth,
 		&i.GridHeight,
 		&i.MaxPlayers,
+		&i.GameMode,
+		&i.Score,
 	)
 	return i, err
 }
@@ -186,7 +192,7 @@ func (q *Queries) GetGamePlayers(ctx context.Context, gameID string) ([]GamePlay
 }
 
 const getGamesByUserID = `-- name: GetGamesByUserID :many
-SELECT g.id, g.board, g.current_turn, g.status, g.winner_user_id, g.winning_cells, g.created_at, g.updated_at, g.rematch_game_id, g.game_type, g.grid_width, g.grid_height, g.max_players FROM games g
+SELECT g.id, g.board, g.current_turn, g.status, g.winner_user_id, g.winning_cells, g.created_at, g.updated_at, g.rematch_game_id, g.game_type, g.grid_width, g.grid_height, g.max_players, g.game_mode, g.score FROM games g
 JOIN game_players gp ON g.id = gp.game_id
 WHERE gp.user_id = ?
 ORDER BY g.updated_at DESC
@@ -215,6 +221,8 @@ func (q *Queries) GetGamesByUserID(ctx context.Context, userID sql.NullString) (
 			&i.GridWidth,
 			&i.GridHeight,
 			&i.MaxPlayers,
+			&i.GameMode,
+			&i.Score,
 		); err != nil {
 			return nil, err
 		}

db/gen/models.go

@@ -22,6 +22,8 @@ type Game struct {
 	GridWidth     sql.NullInt64
 	GridHeight    sql.NullInt64
 	MaxPlayers    int64
+	GameMode      int64
+	Score         int64
 }
 
 type GamePlayer struct {

db/gen/snake_games.sql.go

@@ -11,9 +11,9 @@ import (
 )
 
 const createSnakeGame = `-- name: CreateSnakeGame :one
-INSERT INTO games (id, board, current_turn, status, game_type, grid_width, grid_height, max_players)
+INSERT INTO games (id, board, current_turn, status, game_type, grid_width, grid_height, max_players, game_mode)
-VALUES (?, ?, 0, ?, 'snake', ?, ?, 8)
+VALUES (?, ?, 0, ?, 'snake', ?, ?, 8, ?)
-RETURNING id, board, current_turn, status, winner_user_id, winning_cells, created_at, updated_at, rematch_game_id, game_type, grid_width, grid_height, max_players
+RETURNING id, board, current_turn, status, winner_user_id, winning_cells, created_at, updated_at, rematch_game_id, game_type, grid_width, grid_height, max_players, game_mode, score
 `
 
 type CreateSnakeGameParams struct {
@@ -22,6 +22,7 @@ type CreateSnakeGameParams struct {
 	Status     int64
 	GridWidth  sql.NullInt64
 	GridHeight sql.NullInt64
+	GameMode   int64
 }
 
 func (q *Queries) CreateSnakeGame(ctx context.Context, arg CreateSnakeGameParams) (Game, error) {
@@ -31,6 +32,7 @@ func (q *Queries) CreateSnakeGame(ctx context.Context, arg CreateSnakeGameParams
 		arg.Status,
 		arg.GridWidth,
 		arg.GridHeight,
+		arg.GameMode,
 	)
 	var i Game
 	err := row.Scan(
@@ -47,6 +49,8 @@ func (q *Queries) CreateSnakeGame(ctx context.Context, arg CreateSnakeGameParams
 		&i.GridWidth,
 		&i.GridHeight,
 		&i.MaxPlayers,
+		&i.GameMode,
+		&i.Score,
 	)
 	return i, err
 }
@@ -87,7 +91,7 @@ func (q *Queries) DeleteSnakeGame(ctx context.Context, id string) error {
 }
 
 const getActiveSnakeGames = `-- name: GetActiveSnakeGames :many
-SELECT id, board, current_turn, status, winner_user_id, winning_cells, created_at, updated_at, rematch_game_id, game_type, grid_width, grid_height, max_players FROM games WHERE game_type = 'snake' AND status < 2
+SELECT id, board, current_turn, status, winner_user_id, winning_cells, created_at, updated_at, rematch_game_id, game_type, grid_width, grid_height, max_players, game_mode, score FROM games WHERE game_type = 'snake' AND status < 2 AND game_mode = 0
 `
 
 func (q *Queries) GetActiveSnakeGames(ctx context.Context) ([]Game, error) {
@@ -113,6 +117,8 @@ func (q *Queries) GetActiveSnakeGames(ctx context.Context) ([]Game, error) {
 			&i.GridWidth,
 			&i.GridHeight,
 			&i.MaxPlayers,
+			&i.GameMode,
+			&i.Score,
 		); err != nil {
 			return nil, err
 		}
@@ -128,7 +134,7 @@ func (q *Queries) GetActiveSnakeGames(ctx context.Context) ([]Game, error) {
 }
 
 const getSnakeGame = `-- name: GetSnakeGame :one
-SELECT id, board, current_turn, status, winner_user_id, winning_cells, created_at, updated_at, rematch_game_id, game_type, grid_width, grid_height, max_players FROM games WHERE id = ? AND game_type = 'snake'
+SELECT id, board, current_turn, status, winner_user_id, winning_cells, created_at, updated_at, rematch_game_id, game_type, grid_width, grid_height, max_players, game_mode, score FROM games WHERE id = ? AND game_type = 'snake'
 `
 
 func (q *Queries) GetSnakeGame(ctx context.Context, id string) (Game, error) {
@@ -148,6 +154,8 @@ func (q *Queries) GetSnakeGame(ctx context.Context, id string) (Game, error) {
 		&i.GridWidth,
 		&i.GridHeight,
 		&i.MaxPlayers,
+		&i.GameMode,
+		&i.Score,
 	)
 	return i, err
 }
@@ -239,7 +247,7 @@ func (q *Queries) GetUserActiveSnakeGames(ctx context.Context, userID sql.NullSt
 
 const updateSnakeGame = `-- name: UpdateSnakeGame :exec
 UPDATE games
-SET board = ?, status = ?, winner_user_id = ?, rematch_game_id = ?, updated_at = CURRENT_TIMESTAMP
+SET board = ?, status = ?, winner_user_id = ?, rematch_game_id = ?, score = ?, updated_at = CURRENT_TIMESTAMP
 WHERE id = ? AND game_type = 'snake'
 `
 
@@ -248,6 +256,7 @@ type UpdateSnakeGameParams struct {
 	Status        int64
 	WinnerUserID  sql.NullString
 	RematchGameID sql.NullString
+	Score         int64
 	ID            string
 }
 
@@ -257,6 +266,7 @@ func (q *Queries) UpdateSnakeGame(ctx context.Context, arg UpdateSnakeGameParams
 		arg.Status,
 		arg.WinnerUserID,
 		arg.RematchGameID,
+		arg.Score,
 		arg.ID,
 	)
 	return err

db/migrations/004_add_snake_mode.sql

@@ -0,0 +1,7 @@
+-- +goose Up
+ALTER TABLE games ADD COLUMN game_mode INTEGER NOT NULL DEFAULT 0;
+ALTER TABLE games ADD COLUMN score INTEGER NOT NULL DEFAULT 0;
+
+-- +goose Down
+ALTER TABLE games DROP COLUMN score;
+ALTER TABLE games DROP COLUMN game_mode;

db/persister.go

@@ -171,6 +171,7 @@ func (p *SnakePersister) SaveSnakeGame(sg *snake.SnakeGame) error {
 			Status:     int64(sg.Status),
 			GridWidth:  gridWidth,
 			GridHeight: gridHeight,
+			GameMode:   int64(sg.Mode),
 		})
 		return err
 	}
@@ -193,6 +194,7 @@ func (p *SnakePersister) SaveSnakeGame(sg *snake.SnakeGame) error {
 		Status:        int64(sg.Status),
 		WinnerUserID:  winnerUserID,
 		RematchGameID: rematchGameID,
+		Score:         int64(sg.Score),
 		ID:            sg.ID,
 	})
 }
@@ -220,6 +222,8 @@ func (p *SnakePersister) LoadSnakeGame(id string) (*snake.SnakeGame, error) {
 		State:   state,
 		Players: make([]*snake.Player, 8),
 		Status:  snake.Status(row.Status),
+		Mode:    snake.GameMode(row.GameMode),
+		Score:   int(row.Score),
 	}
 
 	if row.RematchGameID.Valid {

db/queries/snake_games.sql

@@ -1,6 +1,6 @@
 -- name: CreateSnakeGame :one
-INSERT INTO games (id, board, current_turn, status, game_type, grid_width, grid_height, max_players)
+INSERT INTO games (id, board, current_turn, status, game_type, grid_width, grid_height, max_players, game_mode)
-VALUES (?, ?, 0, ?, 'snake', ?, ?, 8)
+VALUES (?, ?, 0, ?, 'snake', ?, ?, 8, ?)
 RETURNING *;
 
 -- name: GetSnakeGame :one
@@ -8,14 +8,14 @@ SELECT * FROM games WHERE id = ? AND game_type = 'snake';
 
 -- name: UpdateSnakeGame :exec
 UPDATE games
-SET board = ?, status = ?, winner_user_id = ?, rematch_game_id = ?, updated_at = CURRENT_TIMESTAMP
+SET board = ?, status = ?, winner_user_id = ?, rematch_game_id = ?, score = ?, updated_at = CURRENT_TIMESTAMP
 WHERE id = ? AND game_type = 'snake';
 
 -- name: DeleteSnakeGame :exec
 DELETE FROM games WHERE id = ? AND game_type = 'snake';
 
 -- name: GetActiveSnakeGames :many
-SELECT * FROM games WHERE game_type = 'snake' AND status < 2;
+SELECT * FROM games WHERE game_type = 'snake' AND status < 2 AND game_mode = 0;
 
 -- name: CreateSnakePlayer :exec
 INSERT INTO game_players (game_id, user_id, guest_player_id, nickname, color, slot)

main.go

@@ -152,17 +152,27 @@ func main() {
 			snakeNickname = c.Signal(username)
 		}
 
-		// Snake create game actions — one per preset
+		// Snake create game actions — one per preset for solo and multiplayer
-		var snakePresetClicks []h.H
+		var snakeSoloClicks []h.H
+		var snakeMultiClicks []h.H
 		for _, preset := range snake.GridPresets {
 			w, ht := preset.Width, preset.Height
-			snakePresetClicks = append(snakePresetClicks, c.Action(func() {
+			snakeSoloClicks = append(snakeSoloClicks, c.Action(func() {
 				name := snakeNickname.String()
 				if name == "" {
 					return
 				}
 				c.Session().Set("nickname", name)
-				si := snakeStore.Create(w, ht)
+				si := snakeStore.Create(w, ht, snake.ModeSinglePlayer)
+				c.Redirectf("/snake/%s", si.ID())
+			}).OnClick())
+			snakeMultiClicks = append(snakeMultiClicks, c.Action(func() {
+				name := snakeNickname.String()
+				if name == "" {
+					return
+				}
+				c.Session().Set("nickname", name)
+				si := snakeStore.Create(w, ht, snake.ModeMultiplayer)
 				c.Redirectf("/snake/%s", si.ID())
 			}).OnClick())
 		}
@@ -181,7 +191,8 @@ func main() {
 				TabClickConnect4:  tabClickConnect4.OnClick(),
 				TabClickSnake:     tabClickSnake.OnClick(),
 				SnakeNicknameBind: snakeNickname.Bind(),
-				SnakePresetClicks: snakePresetClicks,
+				SnakeSoloClicks:   snakeSoloClicks,
+				SnakeMultiClicks:  snakeMultiClicks,
 				ActiveSnakeGames:  snakeStore.ActiveGames(),
 			})
 		})
@@ -599,7 +610,8 @@ func main() {
 				content = append(content, ui.SnakeBoard(sg))
 			}
 
-			if sg.Status == snake.StatusWaitingForPlayers || sg.Status == snake.StatusCountdown {
+			// Only show invite link for multiplayer games
+			if sg.Mode == snake.ModeMultiplayer && (sg.Status == snake.StatusWaitingForPlayers || sg.Status == snake.StatusCountdown) {
 				content = append(content, ui.SnakeInviteLink(sg.ID))
 			}
 

snake/logic.go

@@ -152,8 +152,12 @@ func RemoveFood(state *GameState, indices []int) {
 }
 
 // SpawnFood adds food items to maintain the target count.
-func SpawnFood(state *GameState, playerCount int) {
+// Single player always maintains exactly 1 food for classic snake feel.
+func SpawnFood(state *GameState, playerCount int, mode GameMode) {
 	target := playerCount/2 + 1
+	if mode == ModeSinglePlayer {
+		target = 1
+	}
 	for len(state.Food) < target {
 		p := randomEmptyCell(state)
 		if p == nil {

snake/loop.go

@@ -5,17 +5,23 @@ import (
 )
 
 const (
-	targetFPS        = 60
+	targetFPS                      = 60
-	tickInterval     = time.Second / targetFPS
+	tickInterval                   = time.Second / targetFPS
-	snakeSpeed       = 7 // cells per second
+	snakeSpeed                     = 7 // cells per second
-	moveInterval     = time.Second / snakeSpeed
+	moveInterval                   = time.Second / snakeSpeed
-	countdownSeconds = 10
+	countdownSecondsMultiplayer    = 10
-	inactivityLimit  = 60 * time.Second
+	countdownSecondsSinglePlayer   = 3
+	inactivityLimit                = 60 * time.Second
 )
 
 func (si *SnakeGameInstance) startOrResetCountdownLocked() {
 	si.game.Status = StatusCountdown
-	si.game.CountdownEnd = time.Now().Add(countdownSeconds * time.Second)
+
+	countdown := countdownSecondsMultiplayer
+	if si.game.Mode == ModeSinglePlayer {
+		countdown = countdownSecondsSinglePlayer
+	}
+	si.game.CountdownEnd = time.Now().Add(time.Duration(countdown) * time.Second)
 
 	si.loopOnce.Do(func() {
 		si.stopCh = make(chan struct{})
@@ -86,7 +92,7 @@ func (si *SnakeGameInstance) initGame() {
 
 	state := si.game.State
 	state.Snakes = SpawnSnakes(activeSlots, state.Width, state.Height)
-	SpawnFood(state, len(activeSlots))
+	SpawnFood(state, len(activeSlots), si.game.Mode)
 }
 
 func (si *SnakeGameInstance) gamePhase() {
@@ -152,16 +158,33 @@ func (si *SnakeGameInstance) gamePhase() {
 			// Check food eaten (only by surviving snakes)
 			eaten := CheckFood(state)
 			RemoveFood(state, eaten)
-			SpawnFood(state, si.game.PlayerCount())
+			SpawnFood(state, si.game.PlayerCount(), si.game.Mode)
+
+			// Track score for single player
+			si.game.Score += len(eaten)
 
 			// Check game over
 			alive := AliveCount(state)
-			if alive <= 1 {
+			gameOver := false
-				si.game.Status = StatusFinished
+			if si.game.Mode == ModeSinglePlayer {
-				winnerIdx := LastAlive(state)
+				// Single player ends when the player dies (alive == 0)
-				if winnerIdx >= 0 && winnerIdx < len(si.game.Players) {
+				if alive == 0 {
-					si.game.Winner = si.game.Players[winnerIdx]
+					gameOver = true
+					// No winner in single player - just final score
 				}
+			} else {
+				// Multiplayer ends when 1 or fewer alive
+				if alive <= 1 {
+					gameOver = true
+					winnerIdx := LastAlive(state)
+					if winnerIdx >= 0 && winnerIdx < len(si.game.Players) {
+						si.game.Winner = si.game.Players[winnerIdx]
+					}
+				}
+			}
+
+			if gameOver {
+				si.game.Status = StatusFinished
 			}
 
 			if si.persister != nil {
@@ -171,7 +194,7 @@ func (si *SnakeGameInstance) gamePhase() {
 			si.gameMu.Unlock()
 			si.notify()
 
-			if alive <= 1 {
+			if gameOver {
 				return
 			}
 		}

snake/store.go

@@ -47,7 +47,7 @@ func (ss *SnakeStore) makeNotify(gameID string) func() {
 	}
 }
 
-func (ss *SnakeStore) Create(width, height int) *SnakeGameInstance {
+func (ss *SnakeStore) Create(width, height int, mode GameMode) *SnakeGameInstance {
 	id := generateID(4)
 	sg := &SnakeGame{
 		ID: id,
@@ -57,6 +57,7 @@ func (ss *SnakeStore) Create(width, height int) *SnakeGameInstance {
 		},
 		Players: make([]*Player, 8),
 		Status:  StatusWaitingForPlayers,
+		Mode:    mode,
 	}
 	si := &SnakeGameInstance{
 		game:      sg,
@@ -134,8 +135,8 @@ func (ss *SnakeStore) Delete(id string) error {
 	return nil
 }
 
-// ActiveGames returns metadata of games that can be joined.
+// ActiveGames returns metadata of multiplayer games that can be joined.
-// Copies game data to avoid holding nested locks.
+// Single player games are excluded. Copies game data to avoid holding nested locks.
 func (ss *SnakeStore) ActiveGames() []*SnakeGame {
 	ss.gamesMu.RLock()
 	instances := make([]*SnakeGameInstance, 0, len(ss.games))
@@ -148,7 +149,7 @@ func (ss *SnakeStore) ActiveGames() []*SnakeGame {
 	for _, si := range instances {
 		si.gameMu.RLock()
 		g := si.game
-		if g.Status == StatusWaitingForPlayers || g.Status == StatusCountdown {
+		if g.Mode == ModeMultiplayer && (g.Status == StatusWaitingForPlayers || g.Status == StatusCountdown) {
 			games = append(games, g)
 		}
 		si.gameMu.RUnlock()
@@ -220,7 +221,10 @@ func (si *SnakeGameInstance) Join(player *Player) bool {
 
 	si.notify()
 
-	if si.game.PlayerCount() >= 2 {
+	// Single player starts countdown immediately when 1 player joins
+	if si.game.Mode == ModeSinglePlayer && si.game.PlayerCount() >= 1 {
+		si.startOrResetCountdownLocked()
+	} else if si.game.Mode == ModeMultiplayer && si.game.PlayerCount() >= 2 {
 		si.startOrResetCountdownLocked()
 	}
 
@@ -267,9 +271,10 @@ func (si *SnakeGameInstance) CreateRematch() *SnakeGameInstance {
 	// (which acquires gamesMu) to avoid lock ordering deadlock.
 	width := si.game.State.Width
 	height := si.game.State.Height
+	mode := si.game.Mode
 	si.gameMu.Unlock()
 
-	newSI := si.store.Create(width, height)
+	newSI := si.store.Create(width, height, mode)
 	newID := newSI.ID()
 
 	si.gameMu.Lock()

snake/types.go

@@ -14,6 +14,13 @@ const (
 	DirRight
 )
 
+type GameMode int
+
+const (
+	ModeMultiplayer  GameMode = iota // Default (0) - backward compatible
+	ModeSinglePlayer                 // Single player survival mode
+)
+
 // Opposite returns true if a and b are 180-degree reversals.
 func (d Direction) Opposite(other Direction) bool {
 	switch d {
@@ -88,6 +95,8 @@ type SnakeGame struct {
 	Winner        *Player   // nil if draw
 	CountdownEnd  time.Time // when countdown reaches 0
 	RematchGameID *string
+	Mode          GameMode // ModeMultiplayer or ModeSinglePlayer
+	Score         int      // tracks food eaten in single player
 }
 
 func (sg *SnakeGame) IsFinished() bool {
@@ -132,6 +141,7 @@ func (sg *SnakeGame) snapshot() *SnakeGame {
 	}
 	cp.Players = make([]*Player, len(sg.Players))
 	copy(cp.Players, sg.Players)
+	// Mode and Score are value types, already copied by *sg
 	return &cp
 }
 

ui/lobby.go

@@ -6,20 +6,21 @@ import (
 )
 
 type LobbyProps struct {
-	NicknameBind       h.H
+	NicknameBind        h.H
-	CreateGameKeyDown  h.H
+	CreateGameKeyDown   h.H
-	CreateGameClick    h.H
+	CreateGameClick     h.H
-	IsLoggedIn         bool
+	IsLoggedIn          bool
-	Username           string
+	Username            string
-	LogoutClick        h.H
+	LogoutClick         h.H
-	UserGames          []GameListItem
+	UserGames           []GameListItem
-	DeleteGameClick    func(id string) h.H
+	DeleteGameClick     func(id string) h.H
-	ActiveTab          string
+	ActiveTab           string
-	TabClickConnect4   h.H
+	TabClickConnect4    h.H
-	TabClickSnake      h.H
+	TabClickSnake       h.H
-	SnakeNicknameBind  h.H
+	SnakeNicknameBind   h.H
-	SnakePresetClicks  []h.H
+	SnakeSoloClicks     []h.H
-	ActiveSnakeGames   []*snake.SnakeGame
+	SnakeMultiClicks    []h.H
+	ActiveSnakeGames    []*snake.SnakeGame
 }
 
 func LobbyView(p LobbyProps) h.H {
@@ -40,7 +41,7 @@ func LobbyView(p LobbyProps) h.H {
 
 	var tabContent h.H
 	if p.ActiveTab == "snake" {
-		tabContent = SnakeLobbyTab(p.SnakeNicknameBind, p.SnakePresetClicks, p.ActiveSnakeGames)
+		tabContent = SnakeLobbyTab(p.SnakeNicknameBind, p.SnakeSoloClicks, p.SnakeMultiClicks, p.ActiveSnakeGames)
 	} else {
 		tabContent = connect4LobbyContent(p)
 	}

ui/snakelobby.go

@@ -7,14 +7,32 @@ import (
 	"github.com/ryanhamamura/via/h"
 )
 
-func SnakeLobbyTab(nicknameBind h.H, presetClicks []h.H, activeGames []*snake.SnakeGame) h.H {
+func SnakeLobbyTab(nicknameBind h.H, soloClicks, multiClicks []h.H, activeGames []*snake.SnakeGame) h.H {
-	var presetButtons []h.H
+	// Solo play buttons
+	var soloButtons []h.H
 	for i, preset := range snake.GridPresets {
 		var click h.H
-		if i < len(presetClicks) {
+		if i < len(soloClicks) {
-			click = presetClicks[i]
+			click = soloClicks[i]
 		}
-		presetButtons = append(presetButtons,
+		soloButtons = append(soloButtons,
+			h.Button(
+				h.Class("btn btn-secondary"),
+				h.Type("button"),
+				h.Text(fmt.Sprintf("%s (%d×%d)", preset.Name, preset.Width, preset.Height)),
+				click,
+			),
+		)
+	}
+
+	// Multiplayer buttons
+	var multiButtons []h.H
+	for i, preset := range snake.GridPresets {
+		var click h.H
+		if i < len(multiClicks) {
+			click = multiClicks[i]
+		}
+		multiButtons = append(multiButtons,
 			h.Button(
 				h.Class("btn btn-primary"),
 				h.Type("button"),
@@ -24,22 +42,28 @@ func SnakeLobbyTab(nicknameBind h.H, presetClicks []h.H, activeGames []*snake.Sn
 		)
 	}
 
-	createSection := h.Div(h.Class("mb-6"),
+	nicknameField := h.Div(h.Class("mb-4"),
-		h.H3(h.Class("text-lg font-bold mb-2"), h.Text("Create Game")),
+		h.FieldSet(h.Class("fieldset"),
-		h.Div(h.Class("mb-4"),
+			h.Label(h.Class("label"), h.Text("Your Nickname"), h.Attr("for", "snake-nickname")),
-			h.FieldSet(h.Class("fieldset"),
+			h.Input(
-				h.Label(h.Class("label"), h.Text("Your Nickname"), h.Attr("for", "snake-nickname")),
+				h.Class("input input-bordered w-full"),
-				h.Input(
+				h.ID("snake-nickname"),
-					h.Class("input input-bordered w-full"),
+				h.Type("text"),
-					h.ID("snake-nickname"),
+				h.Placeholder("Enter your nickname"),
-					h.Type("text"),
+				nicknameBind,
-					h.Placeholder("Enter your nickname"),
+				h.Attr("required"),
-					nicknameBind,
-					h.Attr("required"),
-				),
 			),
 		),
-		h.Div(append([]h.H{h.Class("flex gap-2 justify-center")}, presetButtons...)...),
+	)
+
+	soloSection := h.Div(h.Class("mb-6"),
+		h.H3(h.Class("text-lg font-bold mb-2"), h.Text("Play Solo")),
+		h.Div(append([]h.H{h.Class("flex gap-2 justify-center")}, soloButtons...)...),
+	)
+
+	multiSection := h.Div(h.Class("mb-6"),
+		h.H3(h.Class("text-lg font-bold mb-2"), h.Text("Create Multiplayer Game")),
+		h.Div(append([]h.H{h.Class("flex gap-2 justify-center")}, multiButtons...)...),
 	)
 
 	var gameListEl h.H
@@ -68,7 +92,9 @@ func SnakeLobbyTab(nicknameBind h.H, presetClicks []h.H, activeGames []*snake.Sn
 	}
 
 	return h.Div(
-		createSection,
+		nicknameField,
+		soloSection,
+		multiSection,
 		gameListEl,
 	)
 }

ui/snakestatus.go

@@ -12,6 +12,11 @@ import (
 func SnakeStatusBanner(sg *snake.SnakeGame, mySlot int, rematchClick h.H) h.H {
 	switch sg.Status {
 	case snake.StatusWaitingForPlayers:
+		if sg.Mode == snake.ModeSinglePlayer {
+			return h.Div(h.Class("alert bg-base-200 text-xl font-bold"),
+				h.Text("Ready?"),
+			)
+		}
 		return h.Div(h.Class("alert bg-base-200 text-xl font-bold"),
 			h.Text("Waiting for players..."),
 		)
@@ -35,6 +40,12 @@ func SnakeStatusBanner(sg *snake.SnakeGame, mySlot int, rematchClick h.H) h.H {
 				)
 			}
 		}
+		// Show score during single player gameplay
+		if sg.Mode == snake.ModeSinglePlayer {
+			return h.Div(h.Class("alert alert-success text-xl font-bold"),
+				h.Text(fmt.Sprintf("Score: %d", sg.Score)),
+			)
+		}
 		return h.Div(h.Class("alert alert-success text-xl font-bold"),
 			h.Text("Go!"),
 		)
@@ -42,7 +53,11 @@ func SnakeStatusBanner(sg *snake.SnakeGame, mySlot int, rematchClick h.H) h.H {
 	case snake.StatusFinished:
 		var msg string
 		var class string
-		if sg.Winner != nil {
+
+		if sg.Mode == snake.ModeSinglePlayer {
+			msg = fmt.Sprintf("Game Over! Score: %d", sg.Score)
+			class = "alert alert-info text-xl font-bold"
+		} else if sg.Winner != nil {
 			if sg.Winner.Slot == mySlot {
 				msg = "You win!"
 				class = "alert alert-success text-xl font-bold"