Richard Hayler has produced a Simon Says game by wiring up some LEDs onto the breadboard of an ExplorerHAT and then writing the necessary Python code. The LEDs light up in a sequence which you then match by pressing the ExplorerHAT buttons. It’s a very nifty piece of code, although he does admit it’s a bit rough and ready, but it’s a great example of what to do with this great board. Read all about it here.