A third way to ensure 2D graphics work on all platforms and devices is to optimize performance. Performance is important for user experience, as it affects the loading time, interactivity, and smoothness of your graphics. You can optimize performance by reducing the file size, complexity, and number of your graphics. You can reduce the file size by choosing the appropriate format, quality, and compression level for your graphics. You can also use tools, such as TinyPNG, ImageOptim, or Photoshop, to optimize your graphics further. You can reduce the complexity by simplifying the shapes, colors, and effects of your graphics. You can also use tools, such as Illustrator, Inkscape, or Sketch, to create vector graphics that are easier to scale and manipulate. You can reduce the number of graphics by using sprites, which are images that contain multiple graphics in one file, and access them using coordinates. You can also use tools, such as SpritePad, TexturePacker, or CSS Sprite Generator, to create and manage sprites.