I just finished my first Adventure! One page games are a bit tough for me, but it went rather smoothly for me. I may start a second Adventure with my PC, Yorik Tienk, later!
I rolled 2D6 (rerolling 1's) for each room's length and width
Were you using Firefox to open the pdf perchance? I had the same issue, but using Chrome fixed it
I ran this with some friends last week, and we had a blast the whole way through!