In one ‘Challenge Level’ there are 3 goals, and for these 3 goals it normally takes about 2 or 3 runs of the course to beat all the Goals. I personally sat on my chair, looked at my screen and got the stars on my first run. On my second run, I went for my gold run since I learned the map while collecting the stars the first time through. Once you've completed the gold time, you will now want to collect your GS token on your third and final run. You should understand the map well now and should easily spot the GS token by the fly-cam since you saw it twice before.