I definitely agree about the controls needing improvement. I intended to add a rebinding menu but ran out of time.
I wanted the player to have to stand still while breathing because then it adds a level of challenge to when you're able to breathe. I think if the player could control their breath mid air then the game would become far too easy.
As for the spikes, I intentionally made the hitbox on them quite generous because I think it's better for the player to think "that probably should have killed me 👀" than "that shouldn't have killed me 😡".
Thanks for leaving such a thoughtful review. I appreciate it