Here’s the full guide through this puzzle. Shift the right slider to the top and bring the marble into the slot. Shift the slider all the way down. The marble should fall down below the 2nd cross. Bring the marble to the 3rd cross and shift the right slider as shown below. Turn over the

There is a pusher near the locked marble

You have to release one marble using the other one.

Bring the free marble between the locked one and the pusher, then use the pusher.

You need to use both marbles in the next part.

Bring both marbles as shown below, then turn the mechanism clockwise. The last puzzle will be unlocked.

There is an element with an arrow sign.

Remove the key.

The disc with 3 dots should be turned all the way anti-clockwise to unlock the movement of the 1st disc.

Each small knob determines the position of the gear knob with the same pattern. Use the scheme beside the marble track. Remember small knobs should always be set so that the marble runs freely.

Bring the marble to the smaller hollow of the 1st disc.

Check where a small knob points (up, down, left or right) and match this direction to the shape on the scheme. Then turn the gear knob with the same pattern so that it points to this shape. In the example below the small knob points up, which stands for «square». So the gear knob with