I really liked this, the game gets pretty hard pretty fast though, i feel like slowing that progression would be great, not too slow, but def slower, my only real issue would be the use of art, i get that those are premade assets, and it may be hard to get them to match up, but i do recommend to keep all sprites at the same scale, like 1 pixel from the big red ball is much more bigger than 1 pixel from the player, it's usually best to avoid such a thing, also some art assets are made in diffrent resolutions, like you have 16 bit, 32bit and 64bit art combined, to avoid it maybe limit searching for art to one artist, or even just one asset pack