What I liked :
- Simple concept
- Readability
- The lazer that force you to move
What could be improved:
- Without tutorial, I didn't know if I was suppose to move, what was the goal.
- Add some SFX
- Fancier graphics
- Add some explanation to the 2 UI bars at the bottom.(health and phase progression)
- Add a period of rest between two phases, otherwise it can quickly become overwhelming.
- Add some reward at the end of a phase (at least visually), or as an upgrade, etc...
Hope it helps.