通过滑动方向键合并相同数字的方块，最终得到2048这个数字。
使用键盘方向键（↑、↓、←、→）控制方块移动方向。
1. 相同数字的方块相撞时会合并成为它们的和
2. 每次移动后，会在空白处随机出现一个新的数字方块（2或4）
3. 当无法再移动时游戏结束
1. 每次合并方块时，合并后的数字即为得分
2. 游戏会记录最高分
Slide and combine tiles with the same number to create a tile with the number 2048.
Use the arrow keys (↑, ↓, ←, →) to control the direction of tile movement.
1. When two tiles with the same number collide, they merge into a tile with their sum
2. After each move, a new tile (2 or 4) appears in an empty space
3. The game ends when no more moves are possible
1. Each time tiles merge, you score the value of the combined tile
2. The game keeps track of your best score