Really nice and addicting game, the sound desgin and graphics are amazing, little details like the moving background are really cool. The controls are so intuitive that i didn't even need to read the tutorial. Two things i would change tho:
1. I see this with many games, and i don't know the exact issue, but in the WebGL version you have two buttons to maximize the window: The blue one and the white one. You can only see the blue one if you maximize the window with the white one, and then you can't maximize the window anymore and just see a little bit, not full screen.
I don't really know what the issue here is, but what i do is leaving the player settings when doing the build like they are, and on itch.io select "Click to play in fullscreen".
2. Use a different font then arial. That would improve the looks of your game.
I hope my feedback helped you, it would be really cool if you could check out my submission too. Thanks. :)