I like the graphics and concept. Sadly with my video graphics adaptar it goes a bit slowly.
The controls are a bit hard. Why the mouse cannot hit to the cats while it is stopped? I understand you wanted that the player have to move around, but... I think you could add some to the game to pass that.
One thing... Why the cats wants the cheese? They are trying to kill the mouse of hungry? :D
Congrats for the game!