1. First Purple Coin
Run forward and then take the first two Dash Back buttons at the bottom, bounce back from the four-row Surprise Question Block, hop again on the trio of Dash Back buttons at the top and then make a wall jump on the floating column to get the first Purple Coin.
2. Second Purple Coin
Move forward until you come across a stair-like platform then go up until you get to the middle part of the platform to get the second Purple Coin.
3. Third Purple Coin
Hop inside the first cannon you see and then tap the cannon once it is facing the right side of the screen and if it is facing the row of coins in front of it, which is where the third Purple Coin is located.
4. Fourth Purple Coin
Continue moving forward until you find single platforms with Spikes throwing Spike Balls on top of them. Once on the second platform, make a high jump in order to get the fourth Purple Coin.
5. Fifth Purple Coin
To get the fifth Purple Coin, hop inside another cannon and tap to eject once it is facing the right side and when it will help you land on the second highest platform. Doing so will allow you to get the fifth Purple Coin.