Revert "Issue #58 可用方向键移动画面"

This reverts commit a4b27dbaee0b02693152b9c4bb7d20e4a084158c.

Conflicts:
	WorldOfTheThreeKingdoms/YouxiPingmu/MainGameScreen.cs
Revert "調整衝車投石的破壞力"

This reverts commit a58b32a769fe7b14d8d49155404bd67fb79c9b62.