Stay on this rotating mound of earth and run right to collect all of the coins as they appear. Since the mound is rotating left, while you’re running right, you’ll stay in place and let the coins come to you.
Point 3 has a block with a vine.
Climb the vine up to a secret room with a Roulette Block.
There’s a P Switch at Point 6. Hit the Block to expose it, then grab the coins surrounding the center block.