There’s a Super Star hidden in an Invisible Block at Point 1.
The first Star Coin is floating above the Spiders at Point 2. When the Spiders move into range, use them to bounce up and grab the Star Coin.
To collect the second Star Coin, you’ll need the rotating platforms at Point 3. Swing over to the platforms, then use Mario’s weight to move them to the right.
Clear the Spider from your path and move the rotating platforms under the walkway. When you reach the edge of the toxic water, run over and collect the Star Coin to the right.
As you swing from the vine at Point 4, pass through the Red Ring floating above the toxic water. After you swing through the first four red coins, leap from the vine to collect the red coins to the right.
The Block at Point 5 contains a P Switch. Stomp one of the nearby Koopas, then throw its shell at the Block. Activate the P Switch to reveal some blue coins to the right.
When you reach the Spiders at Point 6, look for the Star Coin floating above the toxic water. Aim for the Star Coin as you leap from the vine, then bounce along the Spiders to avoid falling into the toxic water.