adam350z
Smash Cadet
Look at the top right, only 3% done. Look at the lop left, Skyworld is being selected and has a green flag on it, while there is another level to the right that has a exclamation point on it. It seems like only Skyworld has been completed, and there's one new one with the exclamation mark.
After beating one level your only 3% done, 3% * 33 levels = 99% with maybe the last 1 % being the last boss battle.
Seem logical?
Even if there are more completed that we can't see that would only mean there'd be more than 33 levels, because it would've taken more than one level to get the 3%.