| Levels / Level Backgrounds
| A level's background can be standard or tiled. A standard background is simply a large image stretching across the entire area of the level. Tiled backgrounds on the other hand are comprised of a grid of images, each measuring 64 by 64 pixels. Tiled backgrounds load more quickly and consume less memory than standard backgrounds. Very large levels require tiled backgrounds because a single huge background image can not be loaded nearly as quickly as an equivalent grid of tiles. For smaller levels, standard backgrounds are usually better because they are not confined by a limited palette of tile images. Standard backgrounds also benefit from their support of parallax scrolling. If the Parallax Scrolling checkbox is checked in the game's Preferences window, Standard level backgrounds will be displayed in multiple layers, with some layers scrolling more slowly to create a sense of depth. Information on creating level backgrounds is available in the Level Background Design section.