Apart from the graphics that are very pleasing to the eye, I liked the laid back simplicity of the controls. What needs more work are the mechanics. The gameplay is way too repetitive to increase replayability. More levels, with more environmental objects to increase unpredictability, such as rabbit holes that take rabbits from one spot to another in the level would be nice.
One other thing that could spice things up would be a variety of objects to place, apart from obstacles. A carrot, to lure rabbits towards a spot of the level, a pit of mud to slow them down, etc.

Don't get me wrong, the game is just fine as it is, I just don't know how long it could keep me playing before I lose interest.