This game from the film "The Spiderwick Chronicles" is a game of throwing stones against the goblins and trolls to protect his mansion for their invasion.
With the mouse and left button, start the rollers against the goblins to stop them from crossing the line of defense and direction of horseshoes, potions and bags of tomato juice that bring defenses. The space bar allows you to use 3 times (all in all!) A formidable weapon of protection.
(Automatic translation)
A context menu should be shown when right-clicking or, on touch devices, long-pressing in the game. This menu especially allows to play in full screen and control the volume.