Very fun, great feel to the shooting. I hope there's no meta progression planned, but that's just personal preference.
My one gripe was that the stationary close range enemies kill the pacing of levels. Spawners and mages are irrelevant during the fun, hectic beginning portions of levels and I always ended up just doing a circle in an otherwise empty level mopping them up. They don't really pose any threat, just add tedium. The ranged stalks are implemented much better, they participate through the whole level so you're incentivized to kill them on the way.