Well messed around a bit, and for what it was, it was alright. I didn't really figure out a way to mess with a cats stats other than leave them alone and there were way too many cats at any one time to keep track of which ones were breedable and which you were better off selling - but yeah those are just minute balancing concerns for the future. Mechanically, in all its goofy physics glory, it's alright. No troubles and no real glitches either, good work.
This is beyond minor, but I'd appreciate the rain ambience reaching beyond two centimeters from the door. Always liked the rain.