Great game, you deserve more visibility! I think a better cover image and a few screenshots (which do not count in the 3 hours limit) would attract much more players :)
The game mechanic is interesting for a 3 hours jam game. Changing projectile type with 1,2,3 (right hand) is quite hard because I need to constantly move with WASD (right hand too).
Godot is a nice game engine to start. It has plenty of beginner-friendly tutorials and it can runs smoothly even on potato-powered computer. Godot also has a lot of advanced feature if you want to master game dev in the future ;)