Feed the two titans by matching tiles of food and leveling them up, using the mouse to swipe in any of the four directions to move all the tiles towards it. When you do that and two identical food tiles combine, they form a new one of a higher level. Do so to get more points when the two heroes eat them up and keep clearing the screen of tiles because you lose when no more moves can be made. Also, match rocks until you can make diamonds out of them to get extra points.