Nice game! The art style is cute and it generally presents itself well. I love the dirt particle effect when you shoot the ground, an excellent touch.
Also liked the variety of environments and enemies, even if it was mostly visual.
I think it would benefit from a few "game feel" tweaks an additions to bring it to the next level, things like background music, additional sound effects, and a smoother game flow, from things like being able to move while shooting.
A cracking job for a first jam game, good work!