I really enjoyed the changing dialogue as you looped through beating Chaos! The music was good and the controls felt smooth. My one criticism would be that the boss almost never sits still. Which makes slowing time to dodge projectiles feel bad, because you need to slow time to get close to Chaos. Maybe a longer wind up animation on Chaos before he attacks or a longer cooldown after the attacks would help remedy this.
Overall, very fun concept and execution! Nice work!