I like the concept a lot, it kinda reminds me of Katamari! The game seems mostly pretty polished, just wished the bar at the button was more stylized since it's so an important part of the game.
As others have mentioned, eating felt a little weird, it didn't always match the red circle and if you spam space, the animation restarts and nothing gets eaten.
Also, I got to the point where the bar just lost some amount but the character didn't grow.
Overall a great idea, and think it could be expanded on a lot!
Good work!