I have no idea why Itch so rarely shows your game in players' queues and why it has so little ratings. Congrats on having the most Karma of all the raters. You done your part, but itch hasn't done its part. It's not fair. I'll be sure to rate it if it ever comes up in my queue.
I loved the puffer character. Very creative!
I couldn't quite figure out the breathing out though and how exactly to trigger the spikes, and what exactly the numbers in the UI meant. I understood that holding spacebar breathes in, and releasing it exhales, but couldn't make sense of when to breath in and when to breathe out, and how to trigger the spikes by doing so, other than the spike fire once in a while on an exhale. I see the numbers but don't know what they are for.
Any more hints/explanations on it would be appreciated! Could you also post them to the main description too so that other players can learn it too?