I like the aesthetic of the game. However, I do have some comments ! Firstly, I really appreciate the use of an in-game tutorial, but in this case the mechanics were quite self-explanatory and the intro felt really slow. For example, for me personally it's more important to see where I can get the oxygen from than learning how to dodge left or right. Maybe adding a white outline or some effect to the bubbles can help out... Sidenote, I'm not sure after 3 attempts that I can get to the second bubble, which probably means the difficulty is ramping more than exponentially! BUT I always try to close on a positive note, the game really feels good and has a lot of potential.