Boink contains 3D objects that have multiple natures which may be activated by clicking on the specific object or area. Clicking on the object advances it to the next state. Try holding the mouse button down and dragging the pointer from side to side when changing the nature of the lights. Use the Page Up(Down) buttons on your keyboard, while the mouse is in the frame of the 3D world, to advance to different viewpoints. Different natures are available for: cone, cube, sphere, walls, light and the floor.