方块会自动往前走。在屏幕上向上、下、左、右滑动即可转向。吃到目标得 1 分，同时出现一个回声。回声会从起点开始，把你走过的路再走一遍。不要撞到边界，也不要和回声重叠。

这是规则的一部分。方块不能直接转回刚才的方向，也不能停下来。要躲开回声，需要提前留出一条还能走的路。

不会。回声没有追踪。它只重走你已经走过的格子。你如果走回旧路，才会撞上它。

结算页会写明是「撞到边界墙」还是「撞上了回声」。点「重新开始」可以马上再来一局。

最高分只保存在这台 iPhone 上。卸载 App、换手机，或清除 App 数据后，最高分不会保留，也无法从我们这里恢复。我们读不到你的分数。

在开始页或结算页角落的语言按钮上切换。中文界面显示「EN」，英文界面显示「中」。

不需要联网。没有账号、没有广告、没有内购。游戏完全在本机运行。

死亡时会有一声短音效。音效遵守系统静音开关：把 iPhone 侧面的响铃开关拨到静音，音效就会跟着关掉。震动仍可能由系统触感设置决定。

需要 iPhone，系统为 iOS 17 或更高。仅支持竖屏。

The block moves forward on its own. Swipe up, down, left, or right to turn. Collecting a target scores 1 point and spawns an echo. The echo replays the path you already walked, starting from the beginning. Don't hit the border, and don't overlap an echo.

That's part of the rule. The block cannot reverse into the direction it just came from, and it cannot stop. Leave yourself a free lane before the echoes fill the old path.

No. An echo does not track you. It only replays cells you already walked. You hit it when you step back onto that path.

The result screen says whether you hit the wall or hit your echo. Tap retry to start again.

Only on this iPhone. Uninstalling the app, switching phones, or deleting the app's data removes it. We cannot see or restore your score.

Use the language button on the title or result screen. It shows EN in Chinese, and 中 in English.

No. There is no account, no ads, and no in-app purchase. The game runs entirely on your device.

A short sound plays when a run ends. It follows the iPhone Ring/Silent switch. Silent mode turns the sound off. Haptics still follow the system haptic setting.

iPhone on iOS 17 or later. Portrait only.