"An error occurred running the Unity content on this page. See your browser JavaScript console for more info. The error was: SecurityError: The operation is insecure." Got this while trying to start the game.
Not entirely sure but that seems like a problem with your browser or PC permissions level. There's not much I can do in regards to that.
If you cannot get the browser version to work there is always a downloadable version for you. It runs faster and has better graphics presets.
Sorry you were having trouble.