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GemStack is a game where you stack gems to reach a goal. You start with a pile of gems, and you need to stack them in order to reach a certain height. The higher you stack the gems, the more points you earn. You can also earn points by clearing gems from the board. When you clear a gem, all of the gems above it fall down, and you can stack them again. The game ends when you reach the goal, or when you run out of gems.
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