A peculiarity of this level (the last of the regular levels), is the fact that all six Gobbos are located behind the crystal door. Here, your jumping skills will be put to the test. Platform Pete is in the center of the room and will hit a mechanism at regular intervals that will flip all the blue platforms present. When the platform in front of you flips to the smooth side, jump onto it and reach the crate. Crush it to get some crystals. Then follow the path, jumping with timing on the platforms between one pillar and the other when they turn to the smooth side. You will find a chest with the red crystal and another chest containing clear crystals. Then enter the door at the end.
In front of you, you will see a row of blue platforms that form a kind of ladder. When the platforms turn to the smooth side, climb up them quickly, until you reach a pillar with a chest containing crystals. When the next platforms flip over, climb up again to reach a box containing the green crystal. Finally, after having climbed a last row of platforms, you will arrive at the door. Enter it.
Here things get complicated. There are three adjacent platforms in front of you. When they turn to the smooth side, jump on them and go to the end. The next row of platforms will flip over at exactly the same time as the ones you are currently on. You will then have to jump with maximum timing, so that the platforms flip over while you are in the air. Turn right and repeat the process to reach a chest containing the blue crystal. Pass the last group of treacherous platforms to reach the door.
The trick to getting past the next area is to move as quickly as possible. Immediately go up to the platform on your left. From there, you will have to jump to all subsequent platforms as soon as they are within your reach. If you follow this strategy, none of the platforms will flip while you are on top of it. Along the way you will find a pillar, on which there is a chest containing the yellow crystal. Grab it and quickly jump to the last two platforms to reach the door. Enter it
The last zone is similar to the previous one, although longer. The strategy to follow is the same. Climb quickly on the first platform and then on all the following ones, without ever delaying. As soon as the next platform is accessible, jump on it immediately. Along the way you will also find a couple of normal platforms, which will only serve as temporary support. If you act as described, you will get to the top without any of the platforms flipping over while you are on top of it. At the top you will find a chest containing the pink crystal. Grab it and enter the crystal door next to it.
Here you will find a kind of labyrinth of pillars, with the usual platforms that overturn at regular intervals between one pillar and another. On some of the pillars are the chests containing the six Gobbos. A very tricky area, catching all the Gobbos without falling into the void is not easy. The best path is the following. At the beginning, jump diagonally on the platform to the left, to reach the first chest. From here, jumping diagonally to the right, you can reach a pillar with another chest, jumping on a single platform. After grabbing the Gobbo, take the run up and jump right off the right edge of the pillar. You should be able to grab directly to another pillar with a chest on it. Turn left. To reach the next chest you will have to jump over three platforms, one after the other. This is the most difficult point on the route, jump with maximum concentration. Grab the fourth Gobbo, jump diagonally to the left, onto a single platform to reach the pillar in the center of the room, where you'll find the fifth Gobbo. As you did previously, if you take a long jump from the edge of the pillar, you can directly reach the pillar on which the last chest is located. From here, it will be sufficient to jump diagonally on a single platform to reach the exit gong.