Simple, but I really liked it. Though I did figure out that you can just hold the spacebar and "snipe" the spawners from outside the enemies' aggro range, which made the last couple of spawners pretty trivial to destroy.
Thanks for playing!
I think the sniping can be solved by better level design but I ran out of time, so the map is just circles and lines.
I considered giving the bullets limited range but kind of liked that you can just play in map view late game, it feels on theme.
It's true, it was fun to see my beam of death blasting through everything