The MicroBox is a handheld game console that runs on an Arduino UNO R4 - Arduino Blog

TL;DR

Szymon Kubica has created an exciting project that merges software development with hardware design: the MicroBox, a handheld game console powered by the Arduino UNO R4. If you’re a software developer dipping your toes into the hardware world, this is a fascinating example of how you can leverage the capabilities of your Arduino board, which features a Renesas RA4M1 Cortex-M4 microcontroller. With this setup, you can run various games and explore the intersection of coding and electronics.