You don't have to add more categories, add them when game is fully released
Several easy category options could be collecting the first star, collecting all 8 stars, and collecting the first key. Until the full release, those seem like the only categories of sustenance you could add.
You could add a one star category, simply just collect the first star in the quickest time
Call it Star%
sneaky% where you need to beat the demo without getting spotted by peach would be cool
There should be a sub category for the 0.1.0 and 0.1.3 versions of the game because there are some major differences like peach's hitbox for detecting you is a lot smaller in 0.1.0, peach's pathfinding being different and some other little stuff
Oh and also here's the link for the 0.1.0 version download because the creator deleted it https://mega.nz/folder/n9MhnKLC#DXE1_3C1VgkJaNHrN5QrPA
This link has all the versions of the game except (0.1.2 & 0.2.1)
(If anyone has these two versions, please get in touch with me or @Maggitz so we can add them to the folder)
Thank You :)
(UPDATE: Thanks to @voromo4 we have version 0