hey :) just used my regular simple ball point pen (red and black), and because i usually draw in coffee breaks and such, i used the coffee remains to give some sepia brownish color and a cigarette tip to work on the tree... also i pulled the contrast after i scanned it to enhance the lines :) about your mystery game, well didn't find anything; but the devil's doing all the writing and drawing, he has the pen :P also there could be some message in the black background...?