224 route: Slide across the ice and past the fireball, and push the block down onto the ice. Go back to the start (pushing the green button twice en route), and push the block to the right as it passes. Push it all the way to the right, then U after the fireball clears the path. Walk through the toggle walls, push the blue button, collect the red key, go through the recessed walls and force floors to reach the red door, and push the block L 4U. Now push the block down (collecting the blue key en route), and push it to D L from the start. Go through the blue door and through the teleport to get the yellow key. Teleport back, and push the block through the yellow door and into the teleport, waiting  in the process. Now follow the block – if timed correctly, the block and one of the gliders will partial post the teleport, causing Chip to emerge from the teleport to its left. Push the block onto the brown button and go through the tanks to collect the skates. Teleport down and push the block through the teleport and through the bug room to explode the bomb guarding the exit.