Mushroom-A

There’s a spiked ball rolling back and forth near the Star Coin at Point 1. When the spiked ball rolls toward the Star Coin, jump up to the platform above it. When the spiked ball rolls away, drop down, build a bit of speed, and slide through the gap to collect the Star Coin.

The path splits at Point 2. To collect the second Star Coin, you must follow the path near the right wall.

As you jump up along the platforms, slip past the spiked ball and grab the Star Coin.

When you pass through the Red Ring at Point 3, the red coins appear above you.

One of the red coins is floating beneath a Donut Block. It takes some time to drop the Donut Block through the coin, so move quickly!

The two spiked balls at Point 4 prevent you from collecting the Star Coin without taking damage. Jump to the ? Switch near the right wall, then use it to open the enclosure above you. After the large spiked ball crushes the two smaller spiked balls, drop down and collect the Star Coin.

The blue pipe at Point 5 leads to a hidden room. Enter the pipe, then dash over and hit the Roulette Coin Block before it’s destroyed.