feat: add custom gameOver condition to GameOptions

- Add optional gameOver field to GameOptions
- Can be a boolean value or a function that receives scoreManager
- Function receives current score metrics to make dynamic decisions
- Enables flexible game-over conditions beyond just time limit
- Example: gameOver: (sm) => sm.efficiency > 150 for efficiency threshold
- Checked every frame during 'started' and 'has-key' states

src/useGame.ts

@@ -6,7 +6,7 @@ import { useHeroRender } from './useCursor';
 import { useScore } from './useScore';
 
 export function useGame(options: GameOptions, platformHook?: unknown): GameManager {
-  const { cols, rows, timeLimit = 600 } = options;
+  const { cols, rows, timeLimit = 600, gameOver } = options;
   const board = useBoard(cols, rows);
   const { containerRef, renderBoard } = board;
   const gameStatusManager = useGameStatus();
@@ -14,7 +14,7 @@ export function useGame(options: GameOptions, platformHook?: unknown): GameManag
   
   const hero = cursor.hero;
   const renderer = useHeroRender({ gameStatus: gameStatusManager.gameStatus, board, hero });
-  const scoreManager = useScore({ board, hero, gameStatusManager, keyManager, rows, cols, timeLimit });
+  const scoreManager = useScore({ board, hero, gameStatusManager, keyManager, rows, cols, timeLimit, gameOver });
 
   const gameManager: GameManager = {
     containerRef,