This is really nice! As you said on discord, our games are kinda similar, at least shooting-wise, you have to stop shooting to reload. I won't comment on this mechanic since I've done basically the same, but you implemented it really well! The whole lighting up the enemies so your friend can shoot them thing is really cool and I like the enemy behaviours. Maybe the enemy projectiles could be a bit bigger (or have some kind of glow) so they'd be a bit more visible, but you're fine if you pay attention to them. Good job!