Apart from understanding the Arduino's code language ... This functionality enables you to use the board (connected to some push buttons) as an alternative keyboard that can send ASCII characters ...

The electronics for this build include a printed circuit board that serves to break out the connections on an Arduino nano to a dozen arcade push buttons, four slide pots, two rotary pots ...

An Arduino Nano controls two relays which in turn can turn the car on, start it, and turn it off. Instead of adding a button for “push to start” he opted for a 13.56MHz RFID module.