Really enjoyed my time with One Hand Clapping. I like platformers a lot and was nice to see a new take on the genre by the power of your vocal chords.
If you take any feed back I'd suggest have different threshold options for people like me who lack the talent to sing and another option for those who can sing and be able to be more precise with notes. I also thought some of the puzzles went on a bit too long as it took a while to reach those notes.
I am looking forward to a full release as it's a concept that I find compelling a lot with the aesthetic of the game. Thanks for sharing the concept demo and hope it reaches a release.