This is a very original TD game. As in other games of the kind you build towers along a path to not let monsters pass. However, you don't just buy and build towers. The tower itself doesn't do anything. It needs a gem on its top. You can create new gems when you have enough mana. The higher you place a gem in the gem section in the right part of the screen, the more powerful the gem will be, but the more mana it will require. Once you have some gems in the gem section, you can combine them creating more powerful gems. The gems must be dragged onto the towers at the game screen to start attacking the enemies. You can also build new empty towers and other structures.
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