Thanks for playing my game! I'm happy that it was fun :). And thank you for the high praise!
I'm a bit surprised the sprint wasn't more clear. I was worried about the clarity of a lot of the systems but I thought the sprint was intuitive. Your stamina SHOULD be nearly if not full by the time your character stops breathing. Did you mean heavy breathing or light breathing in your comment? If I had time I would have made an "exhausted" idle animation as well. Do you think a sound effect and visual cue when your stamina is full or would that have detracted from immersion too much?