I have made a theme inspired by Coverbox and Retrotastic. I enjoy attract mode and wanted something that showed off the art of the games without to many distractions and could work in a multi-platform playlist.
Here are some images from my theme. Supported systems are:Atari 2600, Magnavox, Intellivision, ColecoVision, NES, SNES, N64, GameCube, Dreamcast, Wii, Gameboy, Gameboy Color, Gameboy Advanced, Nds, 3ds, SMS, Genesis, SegaCD, 32X, Saturn, Dreamcast, Turbo 16, Turbo CD, Ps1, Ps2, ScummVM, MS-Dos, Arcade, Stea
Here's a video showing it in action: