Roll and Roll as far as you can...
Touch and hold to roll the wheel
Touch the second finger to make the ball jumping
Try not hit the rock behind and the ceiling
Discovery how to touch, keep and release at the appropriate location of slope for let the wheel keep the speed higher than the rock behind but not shot up due to the inertia of the slope..
add:
touch the second finger to make the ball jumping
add some obstacles for more difficulty
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