The first Star Coin is located along the Amp track at Point 1. Move past the Star Coin, then slip between two of the Amps and double back to collect it.
Before you touch the Red Ring, stomp the nearby Koopa and use its shell to dispatch one of the Amps at Point 2. With one less Amp in the area, you’ll have a much easier time collecting the red coins.
There are three pipes just past the Checkpoint Flag. The first pipe leads to a hidden room.
The second Star Coin is located under the level’s main path. To find it, use an extended ground pound to smash through the Blocks at Point 4.
Follow the passage to the right to find an Amp track above a row of Donut Blocks. Wait for an enemy to pass through the area, then jump up to collect the Star Coin above the track.
The last Star Coin is located below the Donut Blocks at Point 5. Jump onto one of the Donut Blocks and hop in place to prevent it from falling. When both of the nearby Amps pass below you, stop jumping. Ride the Donut Block as it drops through the Star Coin, then leap to safety before you fall off the screen.