I love the pixel art! It's expressive and creative, and there's obviously a lot of love put into the assets. The core gameplay mechanics of top-down shooting appear to be solid and fun. I think the lack of player animation is a little disconcerting, but it sounds like you guys learned a TON from this project.
That's the whole point of game jam's imo, is learning new things, failing gracefully, and for those that want to, building with a whole new team! Congrats on learning so much and creating a fun game!