This is already around 35 hours of work. I'm quite happy though. The gameplay for my previous works took more than 80 hours for shorter gameplay lengths. This is a significant improvement in speed. That said, the upcoming part I'm working on right now is quite restrictive. I may take a while before I can move onto the next slow part of "The Falling Mysts".
For new viewers, yes this will use the entire song. And yes, I will be decorating it on mobile.