Fun idea, reminds me a bit of Katamari Damacy :) I think having the music progress and build up as you eat more stuff is also neat!
I think it takes a little bit too long to get to the next level, I stopped playing once I reached the car level, it would've been perfect if you halved the size meter. Speaking of which, I wasn't sure of what the attacks and defense gauge where supposed to do? The speed meter filled rather quickly too, and once it's full, if your character is too small, it's really hard to control. Regarding the controls, if you're using Unity, you can allow the player to use the arrow keys to move around really easily by using the axis input system, which is always some good QoL.
So overall, the experience is made a little rough by the lack of explanation from the game. I think having a mini-map that tells you where there's an accumulation of food would've made it amazing, but of course, we've only got a week. Still cool you managed to finish it and submit it!