I really like the idea of having a huge swarm of magnetic balls to be used as a shield and a weapon! It's definitely a really cool visual and I'm sure there's a lot you could do with that idea and mechanic.
I see that you guys didn't quite finish on time, but that's alright! It's still cool you guys submitted something for the jam even if it wasn't quite finished. The game still needs some work and touch-ups on it for sure, but it's a nice little proof of concept you whipped up. Keep working hard!