Ahh, that level :P
A few tips
1) You can pay a tiny fee of star bits to move the prankster comet - so you can leave this till last
2) If you want, a second player can help you very much, they can hold the green platforms, to prevent them from disappearing while they hold them
3) Yes, it is one of the harder stars to get (the 100 purple coin challenge in dreadnought galaxy (the one where you are on the floating platform and have to dodge the electricity and cannons being fired at you) is harder)
4) Keep trying, I despaired for ages, then got it all of a sudden
5) Thanks for the map truckosaurus, my approximate route is shown using my mad skillz at image editing :P That route should get you 115 coins, so if you miss a couple dont sweat it. Or if you're running out of time cut out a section such as the arm with the 1up on it
