Hey Spiderhead!
thanks for playing. The spawning issue is actually a bug that I can't fix because of the jam :(. but all you have to do is reload the page after each death. essentially there is a counter for how many enemies are spawned and the game wont spawn new enemies if it is over that number, but when you die right now it doesn't reset that number to zero! it was something I implemented last minute and didn't test out so my bad haha.