I work at a kids tech camp and a few of my kids have had the same problem where the platforms or ledges they have can be jumped into and the characters get stuck. It is usually on games where they have about three platforms at different heights up the frame that are the length of the frame, with a small gap for the player to jump through and they have to jump onto each one to reach the top. Even though I have told the player to stop if he collides with the platforms he still jumps through them and gets stuck. This is very frustrating for me and the kids. Anybody have any ideas??