...Nah, still can't figure this mood-swinging puzzle out. I get everything that needs to be done, from the valve to the cakes and the generator, but the use of the slides is confusing me. The punchcard doesn't get printed out until you've gone through all the slides, so how can they really have an impact on his mood when you have to look at 'em all anyway? Unless you can get the card to print out some other way? Or am I missing something else? Question mark?
This is the first puzzle I've come across for the whole season that frustrated me enough to look for a solution before figuring it out. I'm just certain that I'm missing something that should be plain to see...
EDIT: Moments after I write it, I figure it out! If anyone else is stuck, just be patient. Perhaps finish what you've started in another area...