Rolling on The Walls: Don't fall down zig zag walls

Rolling ball on zig zag walls and don't fall down

Just tap on screen to turn left or turn right the color ball rolling on zig zag walls. You have to tap right time to keep the ball don't fall down the walls. Turning time will correspond to level you are playing. The last wall will have a gate to go inside. Try to get gems on the walls as much as posible to unlock new ball with other color.
Good luck!