Jump to the collapsing platform in front of you and then to the pillar with a single crystal (it's the camouflaged red crystal). As soon as you get on it, the pillar will begin to descend quickly. During the descent, you will be attacked by some pirates with a sword (the Snipe Swyftly in fact), who will arrive on the pillar. They can come alone or even in pairs. You will have to push them down, hitting them with the tail. However, shortly thereafter, others will appear. You don't have any clear crystals right now, so be careful. Once at the bottom, smash the two crates in front of you to get some crystals and the first Gobbo, then enter the door.
There is a bonus area nearby, to access it, consult the relevant page. Climb the up and down moving pillars and reach through the collapsing platforms the three pillars on the left, on which there are crates. Two of them contain crystals and the third the second Gobbo. Then move on to get the crystals on the pillars to the right. The second pillar however, on which the camouflaged green crystal is located, will begin to descend as soon as you step on it, just like the one you just passed. Fight the pirates until you get to the bottom. Go up the steps and enter the door.
A ring of pillars moves up and down in front of you. Jump on it and collect all the crystals. The chest in the center contains the blue crystal. After getting everything, jump to the collapsing platform on the left and kill the Dark Dantini on the pillar. Then walk the row of pillars that moves up and down until you reach the door. Along the way you will also find a chest with the third Gobbo.
Also in the next area you will have to advance on a row of pillars that moves up and down, collecting the crystals. Turn the corner and advance on the pillars that move horizontally. There are crystals here too. But watch out for the attacks of the Dark Dantini on the left. Then kill the Dark Dantini and move on. The next part is pretty much the same as the one you just went through. In the corner you will find a chest with the fourth Gobbo and one of the last crystals you will find is the camouflaged yellow crystal. Then reach the door and enter.
The last area is also very similar. Continue on the pillars that move horizontally and collect the crystals. Among them there is also the pink crystal. Kill the Dark Dantini and crush the chest in the corner to get the fifth Gobbo. Then continue to the crystal door and go through it.
You will land on a pillar which will begin to shrink as you step on it. When it has shrunk by half, another pillar will appear adjacent to it. Jump on it before the first pillar disappears. This will also start to shrink and shortly after another pillar will appear next to it, which you will have to jump on and so on. Keep repeating the process until you reach a pillar with the chest containing the last Gobbo. Then hit the nearby gong to complete the level.