Alright, so, first and foremost, user experience (UX) is important, and because it is, we don’t want the UI tipping players off, for being too overwhelming. The initial user interface is good, however, when you enter the obby creator, the font of the text makes it hard to understand what’s going on for up to a whole minute, if not even more. It would be smart to change the font to something that is easier to read, such as Gotham or Arial (yes, albeit they look basic, they are a lot easier to read).
Alongside this, you want to make sure that all of the obby creator UI is intuitive, which means that players should be able to understand the functionalities through either straightforward and descriptive text, or icons. Icons may be significantly harder to do right though, so I recommend going with text.
Secondly, there is no form of reward for making an obby at all, a lot of players do not want to spend time on something unless they are rewarded for it, an example would be adding a way to monetize your obby, by adding shirts that will give you a special type of tool which will assist in doing the obby, and adding shirts for donations in general. This will encourage players to create their own obbies as they can make some profit from it.
Lastly, you want to keep on adding more features to the actual obby creator itself, or should we say content? It’s important for a creator to be able to express themselves when making their obby, with this said, you should either remake the obby creator to act more or less like Roblox Studio, and let them be able to fully and freely decide how they want their obby to be, or you could just add enough content for the obby creator to allow for a lot of customizability. If you decide to go down the Roblox Studio path, it might be smart to make it an option rather than the default way of creating an obby as that would save all of the progress you’ve made so far with your obby creator.
Note: Be turn music on by default, as people might never discover the music feature if it’s left turned off by default!
You’re already onto some other things as well with your options, so explore those fields more!