Go to world 1-3 and find a potion. Now find the vase next to the brick building all the way to the right side of the level. Drop the potion and go into Sub-Space and then warp into the vase (stand on ...

Before the checkpoint, there are four block platforms that rotate 180 degrees back and forth. When the upper-right one is horizontal at 270 degrees, jump onto it. When it moves upward, jump to the ...