Just letting you know - there is already an update available for the game. It doesnt seem took large, only too me 20 seconds or so to download. Probably nothing too amazing - someone else might know the ins and outs of what it is - but just to let you know it is available and necessary to download before you can play.
Mine notified me and updated automatically as I launched the game this arvo but if yours does not, and you have issues - open your MoHupdater file and install the new update manually.