So far I have beat the game, found 490 green orbs and 206 Hidden (blue) orbs.  There are a couple of blue orbs that seem impossible to get though.  I finally gave up collecting the rubber ducks, I had 27 of them. If you don't know, there is a lvl 4 green orb on top of the big metal sphere, the one that has the spinning thing in it.  I hope to have this part of the game complete by this weekend, so I can check in to rehab.