- Visuals: Simple, but easy to read!
- Sound: The background song itself is a nice loop. I would agree that some audio feedback (sounds when picking up the blue stuff(gas?), beating enemies, opening doors) would help with the overall gamefeel.
- Engagement: It's easy to want to reset and try again. This is clearly a game for the speedrunners. I can see a group of friends challenging each other to get the fastest time.
- Spectator Appeal: Fun for someone who's played to watch how others do it. Hard to say for someone hasn't played it, though.
- Ease of Learning: As far as basic controls go, it was straightforward. It wasn't really clear to me what the priority was - do I want to avoid enemies? do I want to collect all the blue stuff? Should I just be gunning for the finish ASAP? I think some feedback on how your score iterates depending on what you do can go a long way!