[Andy]’s keypad uses the very affordable Seeeduino Xiao, a tiny board that natively runs Arduino code. Since it has a SAMD21 processor, [Andy] chose to run CircuitPython on it instead. And lucky ...

The CircuitPython code can be modified to add new features or adjust existing ones. For example, you could add a visual indicator to accompany the auditory beat, making it easier to follow along.

He spends a second explaining how he gets from Python libraries down to the wire that goes to the Game Boy’s brain — basically, the C code underneath CircuitPython accesses direct structs ...

CircuitPython is a full Python compiler and runtime that runs on the microcontroller hardware. “This is the third beta release of CircuitPython 6.0.0. It is relatively stable overall.