We just released a small update to the demo that addresses a few minor issues with the demo.
Mainly, the primary fix was that the arrow would not point at the proper UI element unless you were running the game in a 16:9 aspect ratio. This has been corrected so it should point properly in any aspect ratio now.
We also addressed a graphical issue that made the whole game look grainy in some cases.
Beyond that, there were just a few minor changes to some text to make the tutorial a bit better.
Enjoy!