Great game!
The pixel art and music are great! The game idea is also very good! I loved the comic-style introduction at the start.
Though, I do have some things that I would change. I don't know if it's just me, but the retry button does not work. I would also change some UI elements. For example, I would give the music/FX bar a more pixelated look because the options menu doesn't seem to match the rest of the game.
But overall, great game! This has great potential