Great animation, graphic and style, but...
...but it's to difficult. levels are too long, so u get bored after a while. attacking from behind is an intresting idea, but u should keep it for further levels, when player has enough money to buy spells that shoot back. and here is another problem: MONEY! i want more fookin' money for every bloody pigeon i shoot! and i think sometimes there are too many bastards at one time to deal with them all, but it's possible that i just suck and i can't play good enough.
Either than that game, is great. graphic is very good, animation is smooth, and the spells shop is an awesome idea.
Keep it up.