The physics are good : it's nice to be able to swing with the keys, to go up or down the rope, and to be stopped by obstacles. After a few moments, I managed to reach the top of the platform. The only concern really is figuring out why by clicking, running and jumping, sometimes the grapple is created, and sometimes not. But that lets imagine some very nice things. However, we will no longer be able to "cross" the walls?