By the way, is there a key to quit a game once started? Pressing arrow keys move the character, while pressing keys like tab, q, or keys not used by the game will say "bad key". In the end, I close the browser tab in order to quit.
There is no explicit, built-in key to quit the game. I assumed that users would either reload the page or simply navigate away or close the browser window when they were done playing, but if there's a convention for quitting browser games from a screen reader context, let me know and I'll see if I can implement it.