PowerUps will help you perform better in your games. You can acquire them using coins in the game's Shop.
The PowerUps that you will find are:
Magneto: using this, you will attract all the coins close to your position when you advance.
Magic Boots: using this, you will jump higher to go over the biggest obstacles.
Duplicator: using this, you will collect twice as many coins.
Extra Reward: using this, you will double the score of the completed challenges.