Scratch操作说明
t to talk;
t说话
y to hide/show messige box;
y显示/隐藏聊天框
e to open/close backpack
e打开/关上背包
v to setting skin;
v建设置皮肤
wasd to move;
wasd移动
space jump;
空格跳跃
use o to svae your level;
用o键保存游戏
use r key to reset level;
用r重置关卡
mouse click to delete/put items;
点击鼠标放置/清除方块
mouse wheel to change items;
鼠标滚轮切换方块
