I really like the art of the different rats, It really adds personality to them and the game as a whole. I also think it's a cute idea that rats work for cheese, as a funny twist on theme!
while I found the concept easy to understand, I wasn't really sure what the stats do, I understand you meant as flavour text from what you've commented. So I'd suggest instead of stats, writing a short sentence about the rat's personality instead, so that it isn't to be confused with in game systems.
Good effort! : )