Thanks!!
WRT shrimps: I guess it's pretty hard to make a flying enemy that isn't annoying. I sort of feel like it's a valid ecological niche, but also they could use a little something nerf-y. I might try and improve the anti-air melee game a bit.
And as the levels are getting more complex some kind of hint/objective system is probably warranted. Ideally also a map although that seems pretty difficult.