Hey, I like the idea of being a hamster and going about your hamster life, but this is basically a platformer where life is reduced to one. Nothing bad in that per ce, but then again not very innovative.
I agree with previous comments about the too long die animation and frictionless materials. Now jumping against a wall behaves a bit strange, not how you would expect it to be on a platformer. Also spikes hitboxes are probably rectangular and hence you visually have clearance for the jumps but then you still die. Those colliders could be more accurate for a better experience.
One biggest minuses was the fact there was no simple restore point system. Now when you die you die and you start from the very beginning. I understand that "one life" is the idea, but still... It's not very fun if you die almost at the end.
Anyway, good job! Keep up the good work!