I saw somebody who did a similar project except the games were actually stored locally, and then the "carts" were 3D printed gameart "boxes" with RFID chips that it would read and use to determine what to load.
My TODO lost includes something similar but with 3D barcodes on the boxes which can be read by a small camera
You wouldn't be though. It's 10 hours younger looking (presumably than your actual age, so it doesn't stack)