I don't like this game for one reason and one reason only. It's based purely on chance. If you're in the middle and a gem appears on either side as far away as it can be, you can't get to it in time.
I have failed this game several times because it decides to put 7 gems in a chain on the sides. The person who got the score of 60k probably slowed his computer down a shitload and moved back to the middle after every gem. The only way you can get those gems is to either already be on that side or to be moving in that direction. Which makes this game more about luck than it is skill.
And games that rely a large deal on where item placements are, suck ass in my book. At least when they get medals.