To preface, the game does have a bit of an onboarding issue as the mechanics are a little bizarre, the game could have done well with just a single balloon which would reduce the moving parts you need to explain to the player. The mechanic where you alternate suffocating and breathing to extend the balloons lifespan is neat in concept but most people are unlikely to figure it out, especially in a game using breath as a countdown to give the player anxiety and should probably be explained explicitly. That being said though, the artstyle is good enough to set up a very anxiety inducing mood and the audio design contributes to it as well, making for a really unique spooky experience, with the alluded narrative adding even more dread to the experience. I'm a big fan of these kind of games so I might be bias'd but I'm looking forward to what else you'll cook as you get more proficient at designing mechanics!