Cool game, but FYI it seems to have an issue on firefox, or maybe with certain extensions. On chrome the game runs fin, but on firefox the the button does nothing and the console is flooded with this error spammed out:
Uncaught DOMException: <span class="objectBox objectBox-string" <the="" operation="" is="" insecure.<="" span=""> >span class="message-location devtools-monospace">saveload.js:32 load_local https://v6p9d9t4.ssl.hwcdn.net/html/3475668/js/saveload.js?rev=2:32</span>
game_loop https://v6p9d9t4.ssl.hwcdn.net/html/3475668/script.js?rev=1:692