This is great!
I love the art, theme and music!
If I was to suggest some things for the gameplay side it would be:
- I like the dodge-roll! I just wish it was needed a bit more since there is nothing to dodge (yet). The mushrooms strike zones you can just walk out from.
- The damage upgrades should probably be procentage instead of raw stats. The raw stats makes the end weapons quite weak since they are just worse version of other cheaper guns for a 5-10 increase in damage, but when I can buy them my other guns already does 50+ with more bullets per shot and faster rate of fire.
- I would like a hold to shoot for most of the weapons. (strong weapons like shot guns and the rifle might be nice to have click to shoot for since that makes it feel more impactful to shoot them.)
- Coins of different values (adds some excitement to picking them up). Adjust prices accordingly.
- I would love a gun or uppgrade with bullet penetration! (or a bullet scatter on impact for some small extra damage)