Looks nice so far man. You should maybe make it like one of those games where each course is kind of narrow, and it's own separate level floating in the sky. Levels floating in the sky are awesome.
Either that or go more realistic and make one full big disc golf course, complete with trails that lead between each hole, and between holes it's open world and you can actually walk around and on the path to the next course. Probably a little harder and less stylistic than floating levels, but it's a neat idea.