Sleight of paw got me :D It's always good to see another game with a similar gameplay and interpretation of the theme, see what's similar and what's different. I'll be honest, yours feels overall more polished, you had time to implement upgrades as well. Are you generating the mice randomly or do you have set pictures?
Loved the whole hand-drawn UI, especially the map. Reminded me of Mewgenics in the best sense.
There are some smaller typos in the text, nothing major, just a recommendation to double-check them.
I'm not sure I understood how the chance to fail the missions works. I'm talking about when the police arrives, not the individual mice getting caught. Is the bar in the top left a chance of failure that is checked on each interaction?
Also, poor Devlin, he was by far my best guy, but he spent more time in jail than on missions.
Congratulations to the game, it's really impressive that you could do this all by yourself!