Not sure why this was posted to HN, but it gave me a nostalgia shot. Weffriddles was huge among my friends in the summer of 2008. I had just graduated high school. About four of my friends and I spent the summer before college Skyping and AIMing late into the night solving these riddles until 3 AM without resorting to the forums for help. I have fond memories of eating pretzel sticks and drinking Dr. Pepper while cracking these clever problems. If anyone wants to attempt all 70 or so levels, I recommend keeping copious notes.