There is very little play testing in this game right now, so I wouldn't be surprised if some of the Gold Challenges are next to impossible to finish. I only complete a few successfully!
I do plan on adding a few new ship in future updates that will have limited speed and acceleration, but I'll keep on mind that you just speed right past the intro. That wasn't a problem I foresaw and it needs to be fixed!
Thanks for posting such a detail comment! It really helps me understand when needs to change in the game!