I like the unique mechanics ! It actually got pretty tough by level 3 so in a weird way I was relieved that there was no more, but at the same time I think this idea could make a really neat little game if you ever get back to it after the jam. I did experience a little bit of lagging but it might be on my end, the rest was smooth and bug free !
Visual wise you can hardly do better, the smooth animation of the menus, the cute art in between levels, the 3D model and the changing expression as the bar fills up, even if it's simple it all fits together nicely despite having both 2D and 3D. The track that plays is nice and I didn't mind the loop.
Overall very solid for a jam game ദ്ദി/ᐠ - ⩊ -マ