I like the main idea. Rewinding and boxing go well together. The rewind was well implemented and the graphics are good. However, this game is absolutely lacking in player-feedback. It doesn't feel like anything is going on. Punches should make sounds, there should be visual effects for when the player or the enemy lands a punch, make the screen flash red, particles... It just feels like I am just watching two boxers play simple punching animations while healthbars are going down.