I really liked the game concep. I don't think I've seen this kind of combination before. However, from an implementation standpoint, there are a few things that could use some work:
The first issue is FPS-related. I could only play comfortably in slow mode because in normal mode my character moved way too fast and became nearly uncontrollable
The character controls also don't feel quite right. I haven't played many platformers so I can't point exactly what's missing, but as a player I can feel that something is off
Part "LMB to grab". The hand mechanic triggered by the left mouse button also took me a while to figure out. I think the issue is that the tutorial moment where it says "LMB to grab" can actually be skipped by using the wall bounce mechanic instead
Are you planning to add any special effects in the future? Would be cool if blood stains on the floor as it moves, similar to Super Meat Boy
I also enjoyed the hand mechanic. Do you plan to develop it further? For example, a mode where the hand has collision and you can jump on it like a platform