Have you ever played Tetris? Gravitris is just like Tetris but the blocks come from all four sides! Your objective in this game is to maneuver the different shaped blocks to the square in the middle of the grid. Use the directional arrows on your keyboard to move the blocks. Use the space bar to rotate them. You must try to get them to fit together. If you make lines, they will disappear. Try not to let them form too much and hit the outside walls. The normal mode allows the lines to disappear. The survival mode does not allow them to disappear. In survival mode, you must try to fit as many blocks together as you can before they hit the walls. The more blocks you fit together, the higher of a score you get. Good luck!