Really funny idea for a game and great low-poly art style (I love low poly). Sadly, the tutorial screen bugged away after a few frames in my first playthrough, so I was a bit confused at first. Otherwise, there isn't much to critisize. Only, that there aren't more stages and some verticality.
The gameplay loop is easy to understand, even without tutorial screen and the timer makes it a bit more exciting because you can strive to get better times than others.
A few issues I've had:
- Walls still kill you when they're moving upwards
- Music is too calm. Maybe you could have used a music that uses a lot of drums and has a fast beat to further underline the time-pressure element
- There's no screen that shows your time after each run