Thanks for playing! Happy to hear you tried to cheese it, most fun I had in play testing was seeing how bad a forgery I could get to pass, and that's from the person who knows what the algorithm's up to :)
At first I thought it was just the points of the letters, but it didn't seem to be that because I tried drawing lines to the points. And I'm still not sure why the straight line worked, but it was fun trying to make weird forges.