It uses the capacitive touch pads on the Circuit Playground Express connected to copper tape around the holes to detect unsteady hands — and then buzz the buzzer and light up the lights in red!!
You can program it with CircuitPython or MakeCode.
Here’s a clip from the long lost TV commercial from the original release of the game in 1981:
Make a robot friend with Adafruit’s CRICKIT – A Creative Robotics & Interactive Construction Kit. It’s an add-on to our popular Circuit Playground Express, FEATHER and other platforms to make and program robots with CircuitPython, MakeCode, and Arduino. Start controlling motors, servos, solenoids. You also get signal pins, capacitive touch sensors, a NeoPixel driver and amplified speaker output. It complements & extends your boards so you can still use all the goodies on the microcontroller, now you have a robotics playground as well.