Looking into it I'm guessing you had console open and in mobile mode (pointer is a dot). Right? In that case there is no "right-click" event in the document context. If you want console open and desktop mode, there is a little icon there to "Toggle device toolbar". Digging into Chrome tools, what a way to spend Sunday night!

Nope, console was closed. But going back to it, it's fine now! Very strange.

(The game state saved in local storage, very nice :))