itch.io

Do you have "Block third-party cookies and site data" checked in Chrome's "Content Settings" ?

https://www.chromium.org/for-testers/bug-reporting-guidelines/uncaught-securityerror-failed-to-read-the-localstorage-property-from-window-access-is-denied-for-this-document

Still I should go ahead and update it so even if you do have this blocked it doesn't break the game. I only use localStorage here to remember the highscore if you leave and come back