There are multiple powerups in Marble Mania.

Gold

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Gold refils the player's timer. When the timer runs out, the level ends. By collecting enough gold, the player can survive longer.

Mushroom

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Mushrooms will change the player's momentum. They will either speed the player up or slow them down, but the player won't know what they do ahead of time.

Gravity Pad

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Gravity pads allow the player to float for a short amount of time.

Goal

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Once the player reaches the goal, the level is complete, and the player will advance to the next level.