Fridge Brilliance

Mr. World wears clothing, unusual for stickmen males, but he looks remarkably similar to the Tally Hall stickmen, who also wear ties and white clothes.

Fridge Horror

King remarks that Mr. World shouldn't overthink their constantly changing environment, lest he become depressed doing so. King's weirdness sensor makes so much sense now.
Mia could have still been alive and conscious when she was thrown into the water.
Forced marriage counts as stalking and at worst rape. Did King plan on making Enemie and Mia consummate after they were married? Probably not, but the whole thing was really messed up if you think about it.
As a split second frame shows in TME, King must have drugged Mr. World with a syringe, which he probably had access to because he was a physician.
Mr. World will probably end up permanently disabled because of them torturing him.