One year of waiting's finally paid off! I made an interactive bossfight in the game JollyWorld and he played it!

Watch Jelly's video:

Play the level yourself: JollyWorld - VS Jelly

My other levels:

edit: I also made a full 16 character mod based on popular Newgrounds characters, including Piconjo, Sublo and Tangy Mustard, and Olive from Olive's Art Venture.