I've seen a lot of sites and idk which ones can be trusted

I recently found PlatinumQuest and it has a section with all of the MBU levels. Would this count as an emulator, and are the runs I do on it allowed?

Link: https://marbleblast.com/index.php/downloads/pq

It was meant to go to the Thundercloud Cup, can you change it?

Create categories for IL runs so we can see who has the best time in any level.

(For an example, see speedrun.com/ssg3)

It was supposed to be in the 'With Powerups' category, is it possible to move it there?

I was looking through the current list and noticed a DLC course was missing, Canyon Land.

I'll look through in more detail tonight if any more courses are missing.

Edit 1: Hazardberry Land's name is Hazardberry Hills