The graphics are spectacular and the audio not only sounds nice, but also fits in really well. Two big things that can be improved though:
- Effects/Player feedback : Some almost necessary effects were missing. For example, there was no feedback for when I hit enemies, and no explosion or sound when they died. No feedback for when the player takes damage or acquires a pickup. I would like to see more sounds, particles, flashes...
- Rewinding: It was there, but I never used it. It wasn't an important part of game-play, it was more like you made this game and then quickly threw in a rewind mechanic. The rewind could also feel cooler: have the screen overlay something, play a sound...
I think graphics are where this game rocks.