Jan 5, 2017, 12:1901/05/17
@Steven James (5 January, 2017, 12:19 PM UTC):
I don't have a Microsoft Surface, nor any associated pens, but is it possible that your pen is malfunctioning, opposed to its interaction specifically with the game?
Does it work normally with other programs?
If so, you could try contacting the Help and Support Desk, with information including (But not limited to) your model, your browser, and your flash version.