1. First Purple Coin
As you continue running forward, you will see the first Purple Coin floating on top of a sliding Buzzy Bettle shell. Make sure to hop on that shell to get enough boost to reach for the second Purple Coin.
2. Second Purple Coin
Move forward until you see two rows of bricks on top of each other. On the top most row, you there will be Surprise Question Blocks in between the row of bricks. Then, below this row the second Purple Coin.
3. Third Purple Coin
Then as Mario moves forward, he will see a row of bricks underneath a thicker row of bricks. Beneath all the row of bricks is a row of Gold Coins, with the third Purple Coin being one of those coins.
Also underneath these bricks is a Buzzy Beetle sliding across so be sure to avoid it.
4. Fourth Purple Coin
Move forward until you find a row of Back Dash Buttons and three Up Buttons, make a spin jump right beside the first Gold Coin in order to get the Fourth Purple Coin.
5. Fifth Purple Coin
To get the fifth Purple Coin, hit the Yellow Switches that’ll reveal some platforms. Then once you see a Surprise Question Block that’s right above a row of red platforms, jump underneath to get the last Fifth Purple Coin.
Note: Be sure to jump under the Surprise Question Block before the red platform disappears.