Pretty good, but there are a few key thing that I think kind of limit the grappling hook. Firstly, the swinging speed was unnaturally slow for me compared to the rest of the gameplay; this made it usually more fun to simply jump around normally. Another thing is that on the upper 50% of the hook area, you fall down until you're on the lower 50%, which (maybe not for everyone, but at least for me) feels like when you're swinging on a swing really high and then you get too high and the swing falls down and you lose momentum and it's really frustrating. Personally, I'd make the rope 'stiff' and make the player stay at a fixed distance no matter the position, but that's just my opinion. Lastly, a good thing add would be some sort of score counter: tricks, air time, anything like that. Adding scoring always makes players more engaged (and competitive). Still, it was one of the msot fun entries I played, so good job!