There is a bonus area here, see the relevant page to access it. Turn left, jump to the small platforms and grab the balloon. Follow the platforms that form a ladder and crush the chest you find on the side of the path to get the red crystal. Go up again and on the top you will find a silver key. Take it and grab the balloon, to go back. Open the cage to get the first Gobbo. Then reach the well by jumping on the treacherous platform and enter it.
Collect the crystals around the well, jump onto the collapsing platform and follow the path quickly, never stopping. Two Dark Dantini on the sides will try to hit you: don't waste time trying to kill them, just dodge their attacks. You will come to a chest containing the green crystal. Immediately after, on a column, you will notice a silver key, take it. Use it to free the captive Gobbo just ahead. Go to the next well and jump into it.
Climb upwards by jumping on the collapsing platforms. You will come to a row of crates suspended above the quicksand. Don't break them, of course, but use them to reach the opposite side. Here you will find another chest. Don't press it, but use it to reach the suspended platform with the button. Press it, go back down and break the chest to get some crystals. Now that platforms have appeared above the quicksand, you can start smashing the long line of crates you passed through. Use the moving platform to reach them and start crushing them, starting with the furthest one, so you can be sure you can always reach them. The crates all contain crystals, except the last one, in which you will find the third Gobbo. Then enter the nearby well.
You'll immediately notice a button on a platform, with two crates on either side. You will have to reach it and press it. The two crates both contain clear crystals. Then jump on the small column to find the camouflaged blue crystal. Continue until you reach the next well (if you haven't pressed the button it will be closed) and jump into it.
Use the rafts that move suspended over the void to reach the monkey bars in the center of this area. Using the same rafts, you can reach four crates, two on the right and two on the left. In one crate you will find the fourth Gobbo, in another one the yellow crystal and in the remaining two of the common crystals. If the mummy bothers you, take it out with a swipe of the tail. Finally, enter the door at the bottom.
Move the movable crate and cross the quicksand, jumping with timing on the two platforms that leap out and the one that collapses in the center. On the two platforms you will find the camouflaged pink crystal and an extra life. Quickly kill the Dark Dantini on the other side and crush the two crates to get some crystals. Then enter the door.
Follow the path ahead of you, carefully jumping on the slender columns. You'll come to a platform with a button and a Burning Dantini - you can only kill it when the flames stop. Press the button to make a platform move and reach the next pillar. The next part is pretty tricky. Jump onto the slender columns and then onto the quickly rotating platforms to reach a chest containing the fifth Gobbo. Then continue jumping onto other small columns and precarious platforms, while avoiding the swaying spiky balls. Reach the crystal door and enter it.
The fifth running race against the ghost begins. The path is similar to the ones you have already taken. Just like in level 3.1, here too you will come to a crossroads, with the standard route that involves going straight. If instead you turn directly to the right, you will skip a section of the path and gain a big advantage over the ghost, which will allow you to collect all the crystals you find without risking being passed (provided of course to proceed quickly). A small difference from the usual is that here, the cage that you will find at the end and that you can open as soon as you take the silver key, does not contain the Gobbo, but a button. Press it to make some platforms appear to the right of the gong. Follow them to reach the last Gobbo. Go back and hit the gong to complete the level.