Gameplay loop is quite enjoyable, a bit of strategy, bit of rhythm, nice!
Pixel art is not that bad actually, I wouldn't say that you suck at it, obeying some general pixel art rules would be beneficial, e.g keeping pixels the same size, avoiding fractional scaling (2x,3x,4x etc). Be less harsh to yourself! Font is bad, it looks blurry and not on grid. Music choice is solid. Style doesn't carry over to UI, tiny pixel art here, before mentioned bad font there and much bigger pixel art on the sides + colors all over the place sheesh. I reccomend using one color pallet throughout the game.