The player is available to manage the marbles, which rolls down the sloping field.
The road is full of
holes, bumps and precipices, which must either overcome the "head", or looking for workarounds.
To complete the level assigned to a specific time and infinite number of lives.
Also there are enemies, like for example crawling puddles acid, sucking tubes, and these players balls.
But basically moving in the complexity of creating portions of the surface.
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