Run to the right to trigger a cutscene. Follow the path to a blockade composed of blocks to the right. Break the blocks and continue down to find and extra life in an alcove on the right. Head left until you reach a series of breakable blocks. Move as high as possible to find another hidden doorway with item blocks within.
Continue to the left until you can move to the pathway below. Take to find another alcove barricaded by breakable clocks. Destroy the blocks to find a Beam Sword hidden behind them. Continue down and to the right to the door.
Go right until you reach a platform and can fo no farther. Drop down on the platform's right side to find an item box. Do not destroy the breakable blocks or you'll fall to your death.
The cloud platforms in this area disappear after a short duration, so time your jump for when they reappear to reach the platform's top.
Continue down and to the left to find an area with falling boulders. To help avoid the boulders, watch for the smaller rocks that fall just before the boulders.
Head left and drop to an area with boulders that do not crumble. When a boulder falls, it continues rolling. Dodge to avoid the rolling boulders as you head to the right.
Greap awaits you at the path's end. Defeat him in the same manner as you did before, then continue on to the final door to clear the stage.