The background and circular environment was really cool and made me actually say "wow" when I opened the game up. I think using rewinding music loop in the background was a really nice touch and really made the atmosphere pop. I think it would've helped if you respawned the player if they touched the rim of the circle, since having to go back and climb back up to the top platform can slow down the pacing a bit. All in all, thought it was super cool!