Epileptic Trees: There is (or at least was for a while) a fairly substantial conspiracy theory on the Homestuck subreddit that "o", the mysterious author of CANWC, was actually Andrew Hussie himself secretly publishing a follow-up or side-story to Homestuck in the guise of a fanwork. Given Hussie's status as a Trolling Creator, it's not nearly as implausible as it may seem.
Growing the Beard: While starting out with its Stylistic Suck being the main focus, CANWC begins to develop a surprisingly serious storyline after the players enter the medium as we see Rose and Kanaya deal with the corruption of their world.
Harsher in Hindsight: The plot about a character on the side of good in the "normal" timeline becoming a President Evil in a different timeline. Funny when it's baby Obana, disturbing when it's Jane circa The Homestuck Epilogues, and outright horrifying when the Candy version of her becomes an empress in all but title.
In the original series, "HUGE BITCH BLUH BLUH" and its variations referred to Snowman, with Vriska only getting the apellation later in reference to her. Here in CANWC, Daddy Vrasky showed up first by way of being Snowman.
Dadd and DD's relationship is this in light of the bonus comics for Homestuck: Beyond Canon, where the Problem Sleuth-verse Diamonds Droog has a bit of Ship Tease with Jane's Dad.
Nightmare Fuel: Yes, believe it or not. (S) AAAAAAAAAAAAA is about a minute of disjointed, echo-y screams that either start playing together or get more distorted near the end of the video, with ambient music playing throughout.
