First off, the visuals are great, you got the values down so well, everything is really readable which is a must for this game. I think the core of the mechanics are great as well, I think the range of movement you can get with the grappling hook is awesome, I was struggling a little with getting verticality in some instances, maybe just needed some time to get used to the mechanics a bit more. Getting the grappling hook double jump was the biggest hurdle for me, tried to just practice getting the timing down but still was getting inconsistent executions. The biggest frustration was having to grapple off enemies, not sure of whether I was going to get the double jump input in intime which would lead to losing half my health or starting the whole level over. Maybe earlier levels could allow the player to grapple the environment predominantly to get around all obstacles and grappling off enemies is a more advanced movement strat that is optional but a fun challenge. Could you add a subtle animation cue to indicate when the window to input the second jump starts and ends? Could be an audio cue as well, maybe there was one and I missed it. It was definitely difficult too, mostly because of level length for me personally. I think smaller and simpler levels to start out would help players get into the game, just because as someone who loves these mechanic heavy movemnt games and who plays a bunch of them I got filtered a bit (I'm actually running into the same problem with my project, to a greater extent even). Again, I think the core mechanic is tons of fun, I love a grappling hook platformer, wish I could get more of a handle on it but it's definitely foundationally solid and something I would pick up.