What a lovely game! The art style is awesome 😁 very well done! Took me some time to figure out that you needed to hit Enter to use the upgrade though.
Move: WASD Jump is with W
Shoot: Enter button
My entry for the Mini Jam-79
Bugs Encounter: there is a bug on the moving platforms where the player jitters, unfortunately I couldn't fix it, I use Godot and i did look up alternatives to fix it, but i ran out of time. you can just jump or wiggle yourself out of the bug. sorry.