I had to turn the volume way up to hear the voices and even then they were still a little hard to understand sometimes, if it's possible to add subtitles they'd be helpful.
In my first session I gave up at the sliding puzzle because the controls didn't feel suited for it, there were lots of halting little motions and shelves constantly catching against each other instead of smooth slidng.
In my second session I somehow ended up clipping the piano through the locked door and ended up stuck.