Making a gd layout (assuming you’re talking about geometry dash) is something that you mostly have fun by tinkering with, so I suggest you probably do that. Add a bunch of obstacles you’re familiar with and is challenging in a way that’s fun, do some trial and error by playing on said layout, and tinker with it by changing areas you find particularly frustrating or boring. Something you can do to make it really fun is trying to incorporate portals in your layout, but that’s just my suggestion.
