Ok- firstly, you need a better thumbnail. You got a fun little game here, but people will skip it, because the thumbnail is just text.
The animal sprites were cute and the animations fluid. Some backgrounds and maybe more detailed terrain would be nice.
I got as far as the level where you need to kill 15 animals. I couldn't jump out of the hole. I guess I could kill 14 animals and then lure the last one to the hole with me?
Also- vampire bunny with a gun? That's just cool :D