That you can watch some little blocks ... Arduino class, the project is “a simple version of Super Mario Bros using an 8×8 LED matrix (one color), an Arduino Nano, two buttons for the input ...

I had cause to have a closer look at some Arduino inputs – it is that fascinating ... have put number on the hysteresis – see table 5.2.3.4 🙂 So it looks like many Arduinos have digital input ...