From the Super Mario Wiki
The course starts out with two Goombas and two ? Blocks. Next is a Lift which takes Mario up to a Pipe which gives him a Big Mushroom. He can then smash the Ice Blocks blocking off another pipe. When he enters the pipe, he gets to a Checkpoint Flag. There is another Big Mushroom, then a set of Trampolines. Next is another Big Mushroom and a Twister which takes Mario up to a Big Goomba and yet another Big Mushroom. There is another Twister which takes Mario up to two Big Goombas and a 10-Coin. There is another pipe which dispenses Big Mushrooms. Soon after is a pipe which takes Mario to the Goal Pole.
"I made an Icicle playground for the kids, but I'm not sure it's very safe. Could someone try to make it to the goal?"
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