Maybe I'm spoiled by my own game, but the controls don't exactly feel right. Jump after hook isn't quite consistent for me, so I find myself mashing the jump button. Adding some input buffer would solve most problems for me, and especially some coyote time when hooking close to wall would be nice.
There are some other controls aspects, but I guess it comes down to design and preference. The damage boosting is neat.
The concept is solid overall.