I think you nailed it here! This game is actually REALLY fun, and I wanted to keep playing to see what different weapons there were and if I could get them to stick to me in better positions.
The presentation is great. The simple abstract graphics make it really easy to tell what's what. The music is a pretty short loop, but it's mellow enough to not get annoying and has a great feel.
The controls are pretty hard to deal get a feel for, but that's an understandable flow for a game Jam, especially when the game is actually really fun anyways!
I'd love to see a polished up version with controller support, expanded music, and maybe some arcadey glowing effects on the in-game shapes.
Top notch submission!