April Fools’ is awful. Devising an entire holiday dedicated to willfully deceiving your loved ones or worse, your customers, is basically the definition of setting yourself up for failure. But even with how bad April Fools’ existence is, and the pantheon of pranks gone wrong, we’re left with at least one 8-bit silver lining...
That port and cartridge are almost exactly what ciciplusplus created by stitching together two existing hacks — one from TheRasteri on YouTube which devises a way of customizing NES cartridges, and this hack from Alastair Aitchison that converts Bing maps to Zelda style 8-bit graphics.
The hardware consists of Raspberry Pi, an FX2LP microcontroller, and the guts from an original NES cart. As noted by Gizmodo, ciciplusplus is currently working on putting the hack inside an actual cartridge housing so that it can be slotted into the NES like a real, physical, game.