First time post and a long time supporter of the game.
After searching the forums I cannot find anything posted recently about playing the game on a tablet with the recent update. I had recently got a Surface Pro 3 with an i3 and the game runs fine aside from using the pen. Touch works fine, but the pen only works as a cursor. Has anyone played the game with the Surface's pen on the most recent update?
I'm fairly sure skullywag has, and he's run into the same problem as you.
(I think) This is the thread Marvin is referring to above.
https://ludeon.com/forums/index.php?topic=21106.0
Yep unity5 broke pen support for the surface. Nothing Tynan can do about it until its fixed there, if it ever does get fixed. Worst part about the updates tbh for me.