Could you tell me, what Device you are using and if possible what kind of browser and version? We tested it on iPhone and Android/Chrome and it's working there. So maybe we can figure out what's going on on your device.
Are you getting some kind of error message? Where are you stuck? Logging in into the lobby or from the lobby to a game account? Just loggen in from my smartphone to the lobby and then to 801. But I clicked the play button to get into 801.