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Continue up the path until you reach the dominoes. Jump across the gap. Continue down the path. Grab the second memory.
This is the Jumping tutorial. The dominoes will form a bridge for you to cross the gap. Keep heading forward until you see more domino blocks. This is the Twirl tutorial. Twirl will allow you to jump farther by spinning you through the air.  To do a Twirl, press Jump and press Jump again while you're in the air. You can twirl up to three times, but only need to twirl once to reach the domino. If you fall you can climb back up and try again. Jump down from the ledge once you get to the platform across the Domino blocks. You will see the girl in white jump down from the ledge first. It is directly in your path at the bottom of the ledge. Grabbing the memory will make some mushrooms appear ahead.