Nickelodeon Game Builder (lost Flash game; 2009-2013)
In the 2010s, there was a Nick.com Flash game known as the SpongeBob SquarePants Level Builder. This Flash game allowed users to create their own levels using SpongeBob inspired assets. Several varients of this creator were released, based on iCarly, The Penguins Of Madagascar, Avatar: The Last Airbender, and Fanboy and Chum Chum.
Status
The games were removed from the site a few years later, making them unplayable. However, the games can still be accessed, but are buried in the site. The catch is, you can't actually play the games, as an error message will pop up. This is because the site is attempting to load the .swf files, but it can't. The closest thing to evidence of this game existing are a few images and a gameplay video by superjonesbros789856 showing off the SpongeBob version of the level builder.