I really enjoyed the game!
It's quite rough around the edges but the core multi use mechanics are pretty well done. You can use your hook to swing around and climb, you can destroy rocks with it to clear a path for you to go, you can pull in objects like crates to help you climb, and you can pull in enemies or destroy them.
I think the essence of the theme multi-use was captured pretty well!
Unfortunately I also found some bugs, nothing that blocked me or anything, but if you like I can post them as a reply.
But overall a nice experience with a really well integrated multi-use item. Well done!