GemCraft Labyrinth is a tower defense game created by Game in a Bottle. Your mission in this strategy game is to combine gems to create a powerful defense that stops the critters.
Create and combine powerful gems with towers, and use them in intricate ways to stop waves of invaders.
You start out with two different gem types for every level and you can purchase more with mana. You can also pause the game to get and make gem combinations. See instructions in game.