Not quite sure what I did wrong, but every playthrough, I'd destroy the first few asteroids (~3 or 4 of them) and then the game would stop spawning any more. This could've been intended, as a riff on permanence, as you permanently have no more asteroids lol, not sure.
I used Shift to reset 5 or 6 times and the same thing occurred. If I'm just missing something, please let me know, I'd love to give your game a fair shake!
If this doesn't happen to most players, I am that weird dude who actually uses Radeon GPUs which (for some god-forsaken reason) seem to produce completely unique Unity bugs that don't show up on Nvidia systems, so maybe it's just that. Either way, let me know :)