An old home computer on a glowing phosphor monitor. Switch it on, pick a disk, play.
Turn your phone sideways for the full-screen console layout.
Switch the set on with POWER. After the memory test the drive boots the disk menu. Pick a game with the stick or the arrow keys, then press FIRE, Space or Enter, or tap it on the screen, to load it. Every disk takes its own time to read, never more than five seconds. Press G to warm-boot back to this menu from any game; RESET restarts the whole console. Each game keeps its own top-ten table on this device.
Monochrome monitors glowed in one phosphor colour, and each phosphor faded at its own rate: long-afterglow green leaves smears behind anything that moves, and the P7 radar tube shows its beam sweeping down, flashing blue-white as it writes and fading to yellow-green behind. The CGA themes use the two four-colour palettes of IBM's 1981 Color Graphics Adapter, seen through a colour tube's stripe mask. This set is old: every turn of the dial degausses the tube, the magnetised colour patches creep back over a few seconds, and you'll spot faint burn-in, dust and the odd picture tear. Switch GLOW off for a clean picture.