feat: add initialSnakeSize and initialFoodCount to GameOptions

- New option: initialSnakeSize (defaults to 3)
- New option: initialFoodCount (defaults to 1)
- Snake spawns with configurable size
- Initial food count is configurable
- Example: useGame({ initialSnakeSize: 5, initialFoodCount: 2 })

src/types.ts

@@ -35,6 +35,8 @@ export type GameOptions = {
   startingLevel?: number;
   foodsPerLevel?: number;
   maxLevel?: number;
+  initialSnakeSize?: number;
+  initialFoodCount?: number;
 };
 
 // ============================================================================

src/useCursor/useCursor.ts

@@ -2,11 +2,17 @@ import { useRef, useState } from "react";
 import type { Direction, SnakeBody, Position } from "../types";
 import type { UseBoardType } from "../useBoard";
 
+export type UseCursorParams = {
+  initialSnakeSize?: number;
+};
+
 export function useCursor(
   cols: number,
   rows: number,
-  boardManager: UseBoardType
+  boardManager: UseBoardType,
+  params?: UseCursorParams
 ) {
+  const initialSnakeSize = params?.initialSnakeSize ?? 3;
   const { containerRef } = boardManager;
   const [snakeBody, setSnakeBody] = useState<SnakeBody>([]);
   const snakeBodyRef = useRef<SnakeBody>([]);
@@ -19,11 +25,10 @@ export function useCursor(
      const centerR = Math.floor(rows / 2);
      const centerC = Math.floor(cols / 2);
      
-      const initialBody: SnakeBody = [
-        { r: centerR, c: centerC },
-        { r: centerR + 1, c: centerC },
-        { r: centerR + 2, c: centerC },
-      ];
+      const initialBody: SnakeBody = [];
+      for (let i = 0; i < initialSnakeSize; i++) {
+        initialBody.push({ r: centerR + i, c: centerC });
+      }
     
     setSnakeBody(initialBody);
     snakeBodyRef.current = initialBody;

src/useGame/useGame.ts

@@ -8,17 +8,17 @@ import { useKeyBindings, type UseKeyBindingsType } from "./useKeyBindings";
 import { useScore } from "../useScore";
 
 export function useGame(options?: GameOptions, platformHook?: unknown): GameManager {
-  const { cols = 30, rows = 20, startingLevel, foodsPerLevel, maxLevel } = options ?? {};
+  const { cols = 30, rows = 20, startingLevel, foodsPerLevel, maxLevel, initialSnakeSize, initialFoodCount } = options ?? {};
 
   const boardManager = useBoard();
   const { containerRef, renderBoard } = boardManager;
 
-  const snakeManager = useCursor(cols, rows, boardManager);
+  const snakeManager = useCursor(cols, rows, boardManager, { initialSnakeSize });
   const { changeDirection } = snakeManager;
 
   const foodManager = useFood(cols, rows, boardManager);
 
-  const gameManager = useGameStatus(boardManager, snakeManager, foodManager, { startingLevel, foodsPerLevel, maxLevel });
+  const gameManager = useGameStatus(boardManager, snakeManager, foodManager, { startingLevel, foodsPerLevel, maxLevel, initialFoodCount });
   const { gameStatus, setGameStatus, startGame, quitGame, togglePause, score, level } = gameManager;
 
   useEffect(() => {

src/useGameStatus/useGameStatus.ts

@@ -8,6 +8,7 @@ export type UseGameStatusParams = {
   startingLevel?: number;
   foodsPerLevel?: number;
   maxLevel?: number;
+  initialFoodCount?: number;
 };
 
 export function useGameStatus(
@@ -19,6 +20,7 @@ export function useGameStatus(
   const startingLevel = params?.startingLevel ?? 1;
   const foodsPerLevel = params?.foodsPerLevel ?? 10;
   const maxLevel = params?.maxLevel ?? 25;
+  const initialFoodCount = params?.initialFoodCount ?? 1;
   const { containerRef } = boardManager;
   const { initSnake, clearSnake, snakeBodyRef } = snakeManager;
   const { spawnFood, clearFood } = foodManager;
@@ -38,7 +40,7 @@ export function useGameStatus(
 
   const startGame = () => {
     initSnake();
-    spawnFood(snakeBodyRef.current, 3);
+    spawnFood(snakeBodyRef.current, initialFoodCount);
     setScore(0);
     setLevel(startingLevel);
     levelRef.current = startingLevel;