Full Game, or just a collection of Levels?

At what point should a collection of levels be called a "full game"?
I've been making progress in my 2nd Mario adventure, but a lot of things I want to include, can't be done with Mario Builder. I don't want to abandon the game in progress, but I'm really wanting to start making a game with SMBX.
So far, the game I'm building has 17 regular levels, 6 Ghost Houses, 6 Fortresses, & 2 World Castles, plus bros battles and other hidden things.
Originally I was planning to make 3 main Worlds, a secret World, & Bowser's World. I have World 1 complete, & World 2 is very close to complete. Should I make a 3rd World & Secret World, or just Make a Bowser Castle and call it done?

full game


regardless, I won't stop you if you plan on doing something else

I'm just kinda torn between wanting to start a new project, using SMBX, and not half a$$ing the project i've been working on. Put a lot of effort into it, don't want to end up being too short. Not that many people are even gonna play it, but whatever. I make it cuz I like it.

I think you should do the smbx project next