Quite a platformer! I struggle a bit with the grappling hook feature, I'm not sure when it's going to shorten or lengthen the rope. Because of that I didn't manage to pass the big climb with spikes on the wall. But it's great work. Love the atmosphere and the gameplay. Congrats!
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Thanks for playing and you feedback!
Mastering the mechanic is a bit of a challenge. The hook is based on the initial momentum of the player. I used it always as help to get higher after the first jump. Basically jump -> hook -> second jump, this should give all the momentum needed to complete the game.
We also included a solution video in the description in case that helps.