What if we split into Ectocomp Classic (3 hours) and Ectocomp Extended (all weekend)?
I’m personally fond of the 3-hour rule because I know I can come up with 3 hours to work on something. Dedicating an entire weekend, or even an entire day, is probably impossible.
But on the other hand, I can entirely understand why people want a longer window, and I don’t want to hamper anyone’s fun.
A variant on the “surprise twists partway through” idea: perhaps for every half hour you take over the three-hour limit, you have to add one additional game/story element? So at 3.5 hours you have to add human bones somewhere in the story, at 4 hours some sort of undead has to make an appearance, at 4.5 a puzzle/subplot about hunger or thirst…