Beta V0.2.0

新增：
立体声
补全虚拟按键动画

改动：
核心毁灭改为塔防模式，更加注重元素克制

你说得对但是我真的忘了这几天我都干了些啥了

Added:
Stereo sound
Complete virtual button animation

Changed:
Core Destruction changed to Tower Defense mode, more emphasis on element restraint

but I really forgot what I have done these days...