20 Year Tribute Demo to the Gameboy by Snorpung.

20Y is intended to be run on either the DMG, Pocket or the SGB. It’s not compatible with GBC nor GBA and will produce graphical glitches when run on the latter systems.

This demo relies heavily on the precise quirks of the hardware it’s supposed to run on, and there’s currently no emulator that is 100% accurate. So if you haven’t the means to use real hardware it’s strongly recommend to use BGB (bgb.bircd.org) as it is the only emulator to the authors knowledge that only has a few minor issues with the demo, and they are barely noticeable.