It's a solid idea. I really like the loop implementation, it's really well made. I couldn't figure out the controls, especially the shooting /unless it means jumping on the enemies heads/. I wish the character was faster, had some kind of dash, since everything for me screams "fast paced game" and then we have the character being quite slow.
However, the art is really cute! The sounds are bringing life, and the game idea and the theme are great, just a tiiiiny bit of speed to make the game satisfying and addictive, and you got a top tier game! Great work!