So for the billionth time, i must admit that perhaps this comic's point was lost on me, that perhaps you must have felt the terrible dread of the imposing snow creature, felt its putrid breath upon your bescarved neck, and thought that each moment must surely be your last, in order to understand what is happening in this comic. But I have a feeling it doesn't matter. I have certainly played games with the same feature, so I'd like to think I can relate.
But ultimately, what is the point? The girl thinks that the monster will kill her, then she finds out that it won't. So her metaphor was....flawed! HA ha ha. Death isn't inevitable? No, just that her image isn't. That last panel is meant to be a sort of "fill in your own joke here" pause because there is nothing funny Randall could actually write there. Seriously, all she could be thinking is "Huh, guess I was wrong."
Of course, what I think this comic is really trying to say is "Guys, I just found out that you can escape the skifree monster, let me show you my knowledge so you will be impressed." but that's just cynical old me talking.