The Ultimate Regret of a Custom Track

I spent hours piecing together a track, initially just to test the limits and see how I could break it. But I got crazier and crazier, ending up with a tangled mess that looked like spaghetti. However, the supposedly 'infinite' editor mode still had its limits. I built so much that I almost couldn't finish it and it became a closed loop. Perhaps, if the system hadn't stopped me from building further, it would have been a hellish track... What's truly regrettable is that I really wanted to try running it myself, but fate had other plans. I don't know if it's a potential bug, but I couldn't find any function or entry point to test run it, so I had to give up.