Demo

-實裝整個校園接可探索的功能，
-輔助角色更重要(失敗條件+補充水球)
-不同種敵人的波次設計
-修復劇情點擊框太小的BUG
-補上一些UI提示

-Implement the explore area of whole school.

-Make supporter more important(fail condition + supplement waterball)

-Variable enemies of wave attack for level design.

-Fixed the click area is too small on story UI.

-Add some useful UI hint.