This is a crazy good game. I do think the theme is a little bit forced into it, but I gotta be honest, for games like this, I don't really care. Game jams can be practice for some of us but it can be also the starting point for something great!
I would personally encourage you guys to keep developing this game. This may be a cliche, but I actually see myself buying a full version of this game on steam. It feels like a really good casual spin on the roguelite shooter genre. It's impressive you managed to do a game so polished, balanced, and most importantly: insanely fun.
Congratulations and keep up the good work!