Hi!
Didn't get the intro scene we can see on the screenshots, but I read the description so I understood the concept. I would say the boss isn't part of the actual game (cutscene) so it feels a bit off to me concerning this limitation.
However, the game has a cool feeling and could totally be deployed on mobile. It's a bit easy (managed to win after a climb of 04:33, first try) even if the difficulty rises the more you play (more stones falling basically).
It lacks of UI indication about your current position, because you don't really know if/when it will ends at some point (num of people/animals to save?).
No sound at all, is it expected?
The stamina thing is alright, but I think it could have been improved a bit like:
- When not moving, rest slowly?
- Rest faster when standing on a platform?