Gemcraft
In this game you are one of the few wizards that could put an end to the havoc and corruption that swarms through the land. Your mission in this twer defense game is to create and combine magic gems, put them into your towers and banish the monsters back to hell where they belong.
Use YOUR MOUSE to click on spell buttons to select them. Drag the gems to move, throw or combine them.

gemcraft is aswesome
nice game