This is a fantastic premise I think can be expanded apon and made into it's own game, after trying it there are a few problems but none that arent easy to fix and I'd personally love to see this blossom into a more in depth game with player collision and the ability to ride eachother.
For now the game is a 3/5 for the difficulty in casual arm walking, only made such for the alternative movement and interesting potentials.
I'd love to get in contact about concepts pertaining to hand based locomotion and possible routes this game can go in if you're interested
The utilization in grabbing and launching from grabs is really nice, and if the joystick was used for a leaning system instead of a movement one, alot of the movement problems would be fixed (as a player could lean closer to the ground to grab it or closer to ledges while in air for that little bit of extra reach)
I'll be around, ready and available if you see the potential in this as I do.
-MelonMan