To answer your mobile question: The game will be released on Steam, but a mobile build is definitely possible. Our game engine was built from scratch to support mobile, so it wouldn't take too long. My only concern is syncing that up with Steam services.
To answer the other statement: The demo will definitely be getting an update to make some levels easier. I've been watching people play, and the game really is a little too hard for most people; I might be the best person in the world at this game, and I find the "hard" levels extremely easy, so it's definitely a problem with internal bias.
Thank you for playing!