The idea is so good and I absolutely love the setting! :D The game itself has huge potential to be super fun but I think it's a bit too difficult to dodge the plain clothes - maybe their count is a bit high for the space in which you can move? And you have to play a while until you can remember which key you have to press in order to get the right color :'D But with a bit of tweaking here and there, it could be even more fun!
Oh, and I love the artwork, there's much work put into this! A really great and cute game you made there in just a few days :3