You own Mr Roller who's immobile. But he can still move in a peculiar way:
There are two ends for the 'Roller'. One end is static and the other end spins. When you tap on the screen, the static end starts spinning and spinning end becomes static. Keep tapping and this keeps changing. You need to learn to tap at the right time.
Move the 'Roller' to catch as many coins as possible without hitting the obstacles.
Never go completely off the screen. You may die.
Never hit the obstacles. You will die.
The more you tap, the faster Mr Roller will be rolling. So keep your number of taps to a minimum.
Tapping obviously costs you fuel. So catch two or more coins in a single sweep to get bonus points and hearts.
Use the hearts to continue the game when you die.
Sounds easy? Give it a try then.