As soon as I started (via browser), my character kept looking downwards, even if I wasn't moving the mouse. Not sure if it's a problem on my end or not, but it made the game very difficult to control.
Sometimes in webgl its completely unplayable for certain pcs, as far as I know its an unity issue, I tried to put some hacky checks to avoid this from happening but for some pcs is still like that, sorry. It should work just fine if you download the windows version if you still want to try it out.