You can make a custom Goober for my newest Joke FtG here, if you want to. So if you want to, remix the project, and read the note to get started.
IMPORTANT: It is not guaranteed for your Goober to get into the game! If enough people actually make Goobers, I'll only choose 1 or 2 to add each update. Even if I choose to add your Goober, I might change the difficulty, area, hint, or description. If I do end up changing the hint, the obtainment method will still be very similar to the original.