YEA
YEA is a small, white piece of text found in the Classic Trilogy games that randomly appears in the top left corner of the game window after the last or only Stinker of that level reaches the exit. The message lasts for a very short amount of time before going away, and the game seems to be in a frozen state while the text is present. What causes the text to appear is currently unknown, but it is thought to only happen when the game is lagging. Members on the Wonderland Forum were wondering what it did, and Patrick Maidorn confirmed that it is a leftover bit of code used for testing when a level ends, and that it seems to have slipped through into the final game.[1]
During a Twitch.tv livestream on August 28, 2020, forum user Kamerson unknowingly encountered the text while playing custom levels for Return To Wonderland.[2] This is the first known instance of it ever being captured on video.