Godot Version
godot 4
Question
Hello! so this year for school we can borrow an argument or project. Im making a rhythm game but thats not the point… I wanted to create a file dialog for adding files (mods) so anyone can create a level. But also i would like to create a level editor. The problem is that i never done an editor like kinda thing. So far i made a menu, shop and level selector with one working level. Yes, today im a lil more precise with the topic bc as i said its for an exam. (if im not taking this then i will borrow south korea or godot engine explaination)
(if its possible can the level be a text doucment?)
You can generate a level based on text files, in fact the standard .tscn files are text, you can open them in a regular text editor and read them.
For modding it will be easiest to use paths that start with user:// instead of res://, these paths point to user data which is not packed with the game so it can be read from and written too by players.
Sorry for being late I had exams. But thanks for the response. I know about the .tscn files being text files but idk I thought about like documents .txt or like .XML like FNF does. But I will try with .tscn 
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Oh right. How do I like make a in game button for importing the levels?? ( I know to do it only with images )
A FileDialog node allows users to select files, it has signals such as file_selected you can use to then open the file.
I only mention .tscn as an example of a text file that is read to generate levels. You probably shouldn’t use that format. Other games do use XML as well, also a good example.
What are you doing to create levels right now? Is it run-time compatible? Otherwise you may have to convert to a simpler non-godot format.