To add a ball (or anything that will merge), go to the "Merge" sprite and add or delete costumes, and the engine will take care of the rest. Please make sure that the costume name is the same as the costume number for all costumes (at least don't make the costume name a number that is not the costume number). It is recommended not to change the size of the ball as it is already the perfect size. To change the grid, go to the grid sprite and modify the tile. NEVER change the size of the tile. NEVER change the number of tiles or their position as this will completely wreck the engine.
