V0.21

优化了角色动画，让头发可以飘起来。

加入了少量引导。

增加了抽象剧情，以成长为题，学无止境。

新增派对爆竹，可以发射彩带。

Optimized character animations so that hair can float.

Added a small amount of guidance.

Added abstract plot to grow up with the theme of learning.

Added party popper that shoot ribbons.