Sorry for the trouble! The game should prompt you when you first load it to have access to your phones sensors so that it can use its accelerometer. Without access you cannot play the game. You might have to clear your browser cache or play in a private session if you'd like to try again.
It's alright! But I did try playing on 3 different internet browsers on my phone, Mozilla Firefox, DuckDuckGo, and the default android web browser. I also tried clearing the browser cache and playing in a private tab, and it didn't work then. I don't know if it's my phone or something else, but I didn't get a prompt asking for permission to access the phone censors.