Play demolition city game and demolish old derelict concrete city buildings, place sticks of dynamite on key areas of the concrete slabs and click on the boom button. Try to get all the concrete slabs to fall below the blue line. The explosives you set not only create a blast force, but also cut the beams at thespot where they are placed. The graphics are simple but effective. There are two lines on the screen which represent the buildings current height and also the height which you must collapse the structure into.