I remember playing this as a part of your presentation and I thoroughly enjoyed playing through this game. Being able to run around as an extremely speedy rat was an experience and even though this game is a commentary on the state of NYC (which I'm definitely all too familiar with due to living there my whole life), being able to slightly suspend belief to fly across the level creates a shock factor that exaggerates the issue but in a good way.
My main feedback would go to the last level and the movement of the rat. Only thing about the last level that would have been nice is to have it more of a maze so the gas feels more threatening, but that's something that can easily be done with time. The movement of the rat is more subjective as if you wanted to turn up the realism I think more time could've been spent on fine tuning the rat's physics. This also could lead to potential level issues/redesigns but the physics of the rat is more subjective and is dependent on how you want the game to feel to the player on a more detailed level. Otherwise this was fun to play and I'm glad I had the chance to playtest it.