In front of you you will see many clear crystals and the Tumbling Dantini (the only one in the game), that gives the level its name. Kill it like any other enemy and get the crystals. Among them there is also the camouflaged red crystal. Then go up to the crate suspended in the middle. Above you will find a golden key. Smash the chest to get the first Gobbo. Then head to the rock face at the bottom and climb the scalable walls, ignoring the lower door. Break the chest to find the green crystal and enter the upper door.
In front of you is a very precarious red bridge, suspended over a chasm. Go to the center of this bridge and wait for it to collapse. You will land on a chest, inside which is the second Gobbo. After taking it, take the door to go back out into the open. Climb the rock face again and enter the upper door again. This time, quickly cross the bridge, crush the chest to get some crystals and proceed down the tunnel. After passing a couple of lava pools, you will come to a precipice, with a purple multi-arrow platform. Use it to reach the two crates on the sides. In one of them you will find the blue crystal and in the other the third Gobbo. Be careful, because there is a flying Dantini that flies over the precipice: if it gets close, knock it out with a flick of the tail. Then reach the opposite bank and go through the door.
Take the crystals in front of you (among them there is the camouflaged yellow crystal) and reach the door with the padlock at the bottom, which you can open with the gold key. You will enter a cave. There are two chests on the sides: the one on the left contains the pink crystal and the one on the right contains clear crystals. You will then have to cross the lava pool in front of you, using the multi-arrow platform. If the two flying Dantini get close, take them out with a swipe of the tail. On the other side you will find the fourth Gobbo. After getting it, go back and go outside.
Grab the balloon on the right to go down to the lower level. Near the gong, on a small platform in the middle of a lava pool, you will find the fifth Gobbo. After getting it, enter the crystal door nearby.
Ahead you will see a long line of adjacent crates suspended in the void. To break them all, you have to be careful to get close to the edge of the next crate when you crush one. That way, after breaking it, Croc will grab onto the edge of the crate ahead and you can hoist yourself onto it. It is not difficult, but still be careful: if you fall, then you cannot go up again. After breaking the last crate, you will obviously fall down and you can collect the contents of all the crates. The first of the row contains the sixth Gobbo, while in all the others there are clear crystals. After you got everything, hit the gong to complete the level.