Wow, did you just fridge the main character in the opening cinematic?? I busted out laughing at the premise of the game. I really appreciated your Controls screen. Letting the player control and being able to jump right into the game from the controls screen was a really nice touch. The controls overall felt pretty good. I didn't get very far, because I wasn't sure what would and wouldn't replenish my oxygen and I got hit too many times. I would also maybe brighten the sight radius overall. It's a little too dark and makes it difficult to navigate or tell there's a platform to jump to nearby.
Really well done though. Looks nice, plays nice, and sounds nice, too!