The firecracker lands against the door (what you thought you were throwing it at the Green Knight & Company?) and explodes.  The door cracks open, revealing a glimpse of the study room in the Castle of Terror. 

"Come on!" you shout to Rocky.  "Let's get out of here!" 

Above your heads, the roof starts to crumble. 

"Self-destruct!" the ghostly elves cry.  "We're doomed!" 

"Stay right here," Rocky says to them.  "We'll come back for you." 

"Okay."  They smile in relief. "We thought we were dead there!" 

Just then, there's a flash of light and a poof of smoke, and a robed figure in a peaked hat emerges, coughing. 

"It's even harder teleporting out of a lion's belly!" says Goofdaln.  "Say, have I missed anything?" 

You and Rocky sprint past him.  You turn back to see the Green Knight, the wizard, the lion, and the dragon charging up the steps.  They halt where Goofdaln is standing. 

"Your turn," the lion says to the dragon. 

"With pleasure!" the dragon says, and chomps Goofdaln in one gulp. 

"I can see this isn't my day," says Goofdaln from inside the dragon's belly. 

You and Rocky emerge into the study just as the roof collapses in Cave I. 

"Was that from the firecracker causing the roof to collapse?" you ask.  "Or from the construction elves' self-destruct device?" 

"My opinion on construction-elf self-destruct devices," says Rocky, "is that they only work when de-activated." 

Just then, you hear a tremendous BOOM! 

Rocky raises an eyebrow.  "What do you know.  Only the clock was defective." 

"Technically," you say, "this is still zero clicks, because we're still on the same web page.  So the self-destruct worked as advertised." 

"Except," Rocky says, looking upward at the chandelier hurling toward you, "it seems to be destroying the castle and not the cave!" 

You rush outside to safety.