I absolutely love the concept and at times it feels nice to play and it looks very nice.
But as it is right now it's just a bit too buggy/janky. I really wanted to complete it and free my friend, so I restarted multiple times, but each time I got stuck somewhere else or sometimes bones would simply disappear...
Would love to play it again if you continue working on it. I feel with a more stable system for the upper body and fleshed out level design this could be something truly great. Great job!