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As its randomly generated I figure its hard to make it look attractive while keeping the the game the same. I think perhaps maybe some variety of different objects you can climb on, like maybe some floating trees or such, just some things other then rock walls.

As for the jumping, perhaps a slider would be good, but there are some jumps that I don't think you would be able to make without the high jump. The Random Generation is difficult to work with in terms with the jumping, because if you affect anything, one might not be able to make a jump. Perhaps an in game method to control the drag or friction on your character, like a press of a button will turn it to Arcade to make short jumps, then you can press the button again to turn it back to the slippery jumps. I don't know if thats possible with Unreal though.