Some of the puzzles in YFFY, particularly in the Jake and James levels, can get really nefarious.
I will be posting solutions to puzzles in order, starting with Puzzle 6 (after the 5 tutorial levels), at the rate of approximately one a day.
Comments and questions are welcome, but to share your own solutions or questions for puzzles that have not been spoiled yet, please start your own thread.
(Also since this is day one, I will be spoilering puzzles 6 through 15 all at once. None of the Adam levels are all that hard, anyway.)