Based on the background, this episode will be released to celebrate Halloween 2019 (along with Episode 378. It will be the fourth HTML5 exclusive episode to be based around Halloween, after Tricky Tower, Licorice Lair and Episode 378.
As of this episode, there will be more HTML5 exclusive episodes than Flash episodes (189 Flash episodes and 190 HTML5 exclusive episodes).
This episode will contain level 5666, the 6th level to end with "666" (which is the number of the beast).