Skyworld Level 4

Skyworld Level 4 is the fourth level of Skyworld, and the entire single player game.

It is the same in both PC and Console versions.

Beginning
The Marbeball rolls to the first checkpoint.

Checkpoint #1
The player's Marbleball must become the Metalball and push four metal boxes against four wooden planks to form a bridge to progress to the second checkpoint.

Checkpoint #2
The Metalball rolls down a very curvy slope, and heads to the third checkpoint.

Checkpoint #3
The Metalball turns back into the Marbleball and rolls past a small bridge and becomes the Metalball again to fall though four cloths and progress to the fourth checkpoint.

There is a hidden path in the level, where the Metalball will roll back the the loose bridge and fall through it, revealing rails that will travel past the cloths, turning the ball back into the Marbleball in the process.

Checkpoint #4
The Metalball will roll down a very steep slope, using one of the three metal boxes to help it avoid it losing control and falling off the level. Then it will turn back into the Marbleball and head to the end of the level.

If you head to this puzzle as the Marbleball via hidden path, it will simply roll down the slope without any help with the metal boxes since it is lighter than the Metalball.