Amnesiac

A bit late, but maybe it will help someone. I don't know how this works, but if you connect a mouse, it will work... I myself have a tablet on win8.1 and fortunately it has a USB port, but if yours doesn't have one, you will have to use bluetooth or OTG cable or whatever is available to you. I haven't found another way... BTW, once you start it, you don't need the mouse anymore, so you can disconnect it. You can start the game at home and then put it in sleepmode or take the mouse with you. (I'm also not sure that it can work in portrait mode when in fullscreen)