Fun, puzzle & war together in this gravity game! More & more challenging levels with beautiful backgrounds for longer entertaining hours. How to play? 1) Only red ball can move. Black balls do not move. 2) Draw lines & shapes and make the red ball hit/bump the black ball. 3) Lines & shapes can only be drawn in free space and not on any object. If you draw a line and if it disappears, it means you cannot draw the line there. 4) You can double tap on any shape to delete it or press the undo butto