When a column contains five gems and another gem is added, the column is destroyed and your mine cart gets damaged. Three of those column destruction will end the game. If you match four gems, you will create a mini bomb that explodes in a three x three pattern. Use them to create space when things are getting tight. Matching five gems will make a mega bomb, which explodes in a full five x five space. If you drag a mega bomb to the middle of the mine cart, you can clear the entire space. Double tap to activate your hand brake bombs to destroy all the gems in your mine cart and slows the speed for a few seconds. Use this when you need to recover from a constant rush of nonstop gems.
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Diamonds will appear occasionally instead of a regular colored gem. They can be matched with any other gem. Use diamonds to continue combos or to eliminate an excess of gems. Use them as soon as they land in your mine carts.
The faster you clear gems, the more your multiplier will increase. It will begin to decrease after a few seconds, before disappearing. If you can clear another set of gems before it disappears, the multiplier will increase and its timer will reset. Clear as fast as possible to maintain its value.
After your second run through the mines, temporary power ups will be available. They will fall into your mine cart like a gem, but are not activated until you break them out of their rocks. To do this, match gems that are next to the trapped power up. The power-ups each have a specific function.
Diamond Rush: Spawns a number of diamonds for you; most useful power-up.
Double Multiplier: Temporarily doubles your current level multiplier; useful to get high scores.
Jackpot: Temporarily doubles coins earned from each gem.
Rocket Cart: Mine cart moves quickly forward for a limited time, all gems immediately destroyed once touched, points are lower than normal, combo multiplier limited to 3x maximum; least useful power-up.
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