Gemcraft labyrinth! In this game you need to do everything in your power (with the help from magic gems!) to stop the evil getting at the finish point. To create the strongest defence you need to create a triple gem as these get very high bonuses! You can also place towers to shoot at the evil to prevent them for getting to the end. Place a tower in the area where it can access a lot of the path and so it will have maximum effect. There are different levels to work your way through but keep in mind that each level does get harder so you will have to come up with a strategy!