4: Once you make this 1-Up appear, it will probably fall right.
It'll ricochet between them, and you will snatch the power-up as soon as it escapes the block you're standing on.
3: To get the Super Leaf power-up, stomp on the Koopa Troopa, pick him up and get on top of the left ? Block.
You'll find a valuable 1-Up in an Invisible Block above the platform. It can be tricky, so don't feel bad if you need several attempts to succeed.
2: Standing atop the pipe, jump up and around the blocks overhead to reach the platform they create.
If you're Fiery Mario, the pesky plants are easy to slash and burn. You'll have to get into this pipe quick, because the Piranha will only stay in its pipe for a second.
1: Carefully time your jumps to avoid the Piranha Plants.