And then there's a combo with all the other yellow gems and LOTS OF FISHES, and it's well as difficult as the green gem combo. The point is that you can get the yellow gems on the net, then fall down on the last yellow gem there, being closest to the platform with more yellow gems. There's a trick that will get Rayman to run immediately after he lands (when he lands, move him forward and also press the right or left button, it's necessary to make the combo work). Then quickly run to the platform, jump onto it and you should get right on time to get the next yellow gem on that platform. Get those gems, and just before you get the last one, shoot the cannon ONCE. Walk back and give it another TWO shots (one is sometimes not enough for one fish ). The pause is important to continue the combo, because while you're busy shooting fish, new fish will appear at the places you shot the cannon at.