Good background story :) game loop reminded of the old game Tapper, graphics were cool like SouthPark - what's not to like :D As you know the spawn rates seem stuck on the first level which is a pity. Well done.
spawns should be faster, also they should increase as the game progresses, I don’t mind tweaking the rate but I don’t want to add the spawn increase while we are in the rating phase of the Jam.