Great job! I love what you did with the visuals, and the effect of the 2D over 3D was cool instead of jarring, which is how I usually feel about it.
I agree with some of the other comments that there wasn't ever a reason for me to stop being a fly (though I can relate... if you check out our game, we only managed to get one level in that encourages you to use our splitting mechanic, and even that only barely!). The enemies didn't really pose a threat, I didn't feel like I had any health or anything to worry about that would prevent me from using brute force to push through them as the flies. Also it would be nice if rabbit form had some ability also, maybe then there would be a reason to switch back. Technically, it felt really good, though there were a couple of visual bugs and the game didn't respond when I tried to press J to play again. Overall though, really strong showing for a 48 hour jam! You should be proud!