I really like the aiming! I've been trying to figure out how to do twin-stick controls in 3D, and I think I get it now. Thanks!
My main complaint is the camera. The way it rotates around the centre was a little nauseating. Could it just have a fixed rotation?
After the boss spawned, the enemies were all just jumping off the edge immediately, so I didn't really have to do anything...
The boss was really impressive looking, and I like how he exploded into parts when I killed him. If the enemies had been spawning properly, it would have been fun to fight around that terrain.