add fire ball
Merge branch 'master' of https://github.com/yibojiang/ChainEffect

Conflicts:
	Assets/Arts/bgMoon_s2.png.meta
	Assets/Arts/bgSky_s2.png.meta
	Assets/Arts/bossWalk.png.meta
	Assets/Arts/stone.png.meta
	Assets/Arts/villiagerAttack.png.meta
	Assets/Arts/villiagerOnfire.png.meta
Merge branch 'master' of https://github.com/yibojiang/ChainEffect
gamejam version