The use of sound to activate the invisible platforms is really good and I like that you can gain new keys as you progress. Having the platforms fade into solid was nice and timing things whilst trying not to run out of breath is great fun. I liked that there was a moving invisible platform too as it can be used to get back up quicker if you make a mistake but it is difficult to jump off it when the platform is moving down and using the key two times in a row to stay on is a pretty cool idea but I did somehow manage to fall through on one occasion when it looked solid. I think this game really shines with its level layouts and I felt like the challenges were all fair and fun
I'll keep you posted when I make my YouTube video, which all being well should be tomorrow