Marble Sort Level 138 — Walkthrough and Solution

Marble Sort Level 138 is a tricky puzzle that demands careful planning from the first move. The board is set up to punish players who tap the obvious front-line marbles, so you must resist the urge to clear them immediately. Instead, the solution is to prioritize the right side of the board, clearing Blue and Orange first to unlock the panels and then methodically sorting the remaining colors.

The playing field has a Top Tray covered with gray mystery blocks in the center, and two large panels marked with a '4' sit in the middle, hiding more marbles. At the very front, you see three exposed marbles: Red on the left, Green in the center, and Blue on the right. The bottom Boxes initially demand Brown, Blue, Brown, and Orange from left to right. The key is to ignore the Red and Green front-line marbles because no bottom Boxes can accept them yet, and dropping them would waste precious Conveyor Belt space.

Marble Sort Level 138 Walkthrough

Your starting bottom Boxes, from left to right, require Brown, Blue, Brown, and Orange. The accessible marbles in the Top Tray are Red, Green, and Blue at the front, plus an Orange marble slightly higher on the right edge. The trap is that Red and Green are tempting but useless at the start, as there are no matching bottom Boxes, so tapping them will clog your belt.

The imbalance is that all safe moves are on the right side: the Blue and Orange marbles have matching bottom Boxes, while Brown must be found in the mystery blocks. You must work exclusively with the right side until you clear four bottom Boxes to break the panels.

How to Beat Marble Sort Level 138 — Step-by-Step

Phase one: Right-side opening

1. Tap the front Blue marble and guide it into the second bottom Box (which needs Blue).
2. Slide the Orange marble from the right edge into the far-right bottom Box (which needs Orange).
3. Search the accessible gray mystery blocks for Brown marbles; when found, drop them into the first or third bottom Boxes.
4. After clearing the first Orange box, another Orange appears below; locate the next Orange cluster in the mystery blocks and deliver it to that box.

Phase two: Breaking the panels

1. Clear four bottom Boxes in total to shatter the two '4' panels.
2. Once broken, the Top Tray reveals a large area: the left side exposes Dark Green and Light Green, while the center and right show White, Pink, Purple, and Blue.
3. Check the new bottom Box demands; they now include Purple, Light Green, and White.
4. Drop the revealed Purple marbles from the right panel into the Purple bottom Boxes to free up space.

Phase three: Late-game sorting

1. Do not release the Green marbles all at once; only drop Dark Green when a Dark Green bottom Box is open, otherwise it blocks Light Green.
2. Prioritize White and Pink marbles from the center to clear the central bottom Boxes.
3. Cycle the remaining colors, keeping the Conveyor Belt from holding more than three unmatched marbles.
4. Finally, release the stacked Green marbles from the left column into their matching bottom Boxes to finish the level.

Tips & tricks

• Always check the bottom Box demands before making a move; never drop a marble without a target.
• Use the Conveyor Belt as a temporary buffer, but keep it as empty as possible to avoid jams.
• When mystery blocks reveal new marbles, quickly match them if they correspond to an open bottom Box.

Common mistakes

• Tapping the front Red or Green marbles at the start, which clogs the belt and ruins the run.
• Dropping Green marbles from the left column too early, blocking Light Green you need later.
• Ignoring the right side and trying to force Brown from mystery blocks without clearing Blue and Orange first.

Marble Sort Level 138 FAQ

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