Stomp the two crates next to you to get some crystals. Then proceed to collect the crystals on the platforms suspended above the quicksand. Among them there is also the camouflaged red crystal. When you are done, go to the door to the left of the starting point and enter it.
Immediately turn right to find a golden key. Then reach the bottom of this area. You will have to watch out for the flames coming out of the green pools and two Dark Dantini that will attack you. Crush the chest you find to find the first Gobbo, then exit the door you entered. This time, go to the door on the opposite side of the room and enter it.
Get the crystals on top of the small platforms above the quicksand, in the corners. One of them is the camouflaged green crystal. Then press the button you will find and quickly climb up the climbing wall next to it. Kill the Red Dantini and jump to the platform that has approached in the meantime. You will then reach a silver key above three stacked crates. Crush the crates to get more crystals and make your way back using the collapsing platforms. Return to the previous area.
Thanks to the silver key, you can free the captive Gobbo in the center of the room. Then reach the closed door at the bottom, open it with the golden key and enter.
You will enter a dark area, where you will have to take the light cans to temporarily illuminate the area around you. Take the first jar and continue holding on to the monkey bars. Grab the crystals and drop onto the elastic platform. Go left. You will find a silver key and another jar. Take it all and go back (you won't get very far if you continue). Continue past the spring platform to find a cage with a captive Gobbo. Free it and continue, passing the quicksand. You will find a crate containing crystals and another jar. Then enter the door.
Collect the crystals around the well, then follow the path by jumping across the platforms. Dark Dantines will attack you when you get close, so be ready to jump to avoid their attacks. Crush the first crate you will find to find some crystals, but it is better not to break the second one and use it to jump on the monkey bars on the left (if you cling below, you risk being hit by the Dark Dantini when it reappears). Follow them, go down and jump on the collapsing platform to reach the end of the path, where you will find a golden key on top of a jelly. Go back, use the jelly to climb on the monkey bars and break the crate you ignored earlier to get the yellow crystal. Go to the well you came out of and jump into it.
You will now have to reach the opposite end of the dark area, past the point where you got the key. At the bottom you will find a chest containing the blue crystal and a closed door, which you can open with the golden key. Enter it.
Smash the two boxes on the sides to get some crystals. Then jump carefully on the platforms that collapse suspended above the chasm. On the lower platform you will find a silver key. Go up on the other side and use the same platforms to reach the cage above you and free the fourth Gobbo. If the Flying Dantini approaches you, take it out with a flick of the tail. Then reach the other side of the chasm. In one of the crates you will find the pink crystal and in the other some common crystals. Then enter the door.
Climb the small platforms to the right being careful not to fall into the quicksand, until you reach a button. Press it and go back. Climb the platforms that appeared on the other side, until you reach a chest containing the fifth Gobbo. Go down and enter the crystal door.
You will now have to face the last challenge against the ghost, as well as the most difficult. This time there are no shortcuts to win easily, so you should leave lots of crystals in the path to slow down the ghost. Here you will encounter many small columns along the way and you will therefore have to jump carefully. There is also a double arrow platform, which you will need to move for a short distance. When you reach the cage with the captive Gobbo, jump on it and go straight ahead, ignoring the collapsing platform to the right. A little further on you will find the silver key. After taking it, reach for the gong. Right next to it, you will see the platform you noticed earlier, which will allow you to reach the cage. Free the Gobbo and go back, hitting the gong to complete the level.