I would like to thank every player who makes the suggestion！
I have made specific changes to the issues raised by the players.
The contents are as follows:
1. Now the player can press "Esc" key to skip the scene animation.
2. Now the first level of the 15 courses has been unlocked! You don't need to finish every level of one course to unlock the next course.
3. Fixed a bug where the "Donut" button was unresponsive at course 6.
4. Fix the problem of low table at course 6.
5. Fixed the bug where the teacher and desk sometimes overlapped.
6. Reduce the difficulty of some course appropriately.

感谢每个提出建议的玩家！对于玩家们提出的问题，尤其是那些反应较为强烈的问题，我做出了针对性的修改。
此次更新内容如下：
1.现在玩家可以按一次"Esc"键跳过场景动画了，不用重复观看。
2.现在15个课程的第一级别难度全部解锁了！玩家可以畅玩每个关卡了！
3.修复了第6课当"甜甜圈"靠近时按下对应按键无反应的bug.
4.修复了第6课台面过低的问题。
5.修复了第9关老师和桌子重叠的bug。
6.适当地降低了部分课程的难度。