Really impressively tight experience! it looks great, plays great too!
I'd say the design has some elements that feel sticky, since i can only shoot while big and enemies all exclusively shoot these huge sweeping bullet patterns i was never incentivized to approach them, it was always better to just shoot at the red arrow off the screen, the bomb also felt very lack luster. I went with a 'shoot a spray of bullets when you grow back to big strategy' and that felt fun and engaging, tho after the spray my gun glitches out for a bit, which i think actually balances well but it would be nice to know ahead of time when picking that up.
I think you have something here! and it's really well polished, i wanna play more! c: