Marble Sort Level 20 Walkthrough & Solution

Level 20 Board Overview: Giants at the Bottom, Question Marks Up Top

Level 20 is a squeeze play. The Top Tray’s bottom row is three enormous 9-marble blocks — Dark Blue, Yellow, and Red — sitting exactly where your finger wants to tap. Above them, the board splits into single marbles, a Tunnel showing 3 on the far left, and a 2x3 slab of question-mark Hidden Boxes locked away on the top right.

The palette here is Dark Blue, Green, Red, and Pink. But your starting receiver Boxes ask for Green, Red, Green, Light Green — four small orders while the tray is showing you three all-you-can-eat giants.

That size mismatch is the whole level. If any of those 9-marble blocks touches your Conveyor Belt before its Box is active, nine stranded marbles eat every free slot and the run is finished on the spot.

The Trap in Marble Sort Level 20

Work the tray left to right and the design intent is obvious:

• Far left: a single Green and a single Dark Blue wedged under the Tunnel, corking the 9-marble Dark Blue block behind them. The Tunnel needs clears to count down.
• Middle: Pink, Light Blue, and Red singles stacked directly on top of the giant Yellow and Red blocks. The singles are playable; everything under them is not.
• Right side: Light Green, Green, Light Blue, and Red singles pinned just below the Hidden Boxes — these are your front-row answers, placed in the most awkward spot on the board.
• Bottom row: Dark Blue, Yellow, Red, nine marbles each. Pure bait. The belt physically cannot hold a giant while you hunt for singles, so the giants wait.

The rule is front-to-back, always: clear what the Boxes want, let the receiver row scroll up, and only then feed the heavy stacks.

Marble Sort Level 20 Step-by-Step Walkthrough

Follow the pull order exactly. One early tap on a big block ends the run.

Opening: snipe the singles

1. Check the active Boxes — you need Green, Red, and Light Green and nothing else.
2. Tap the single Green marble from the middle-left column.
3. Tap the single Red marble from the middle section.
4. Pull the single Green and Light Green marbles from the right side, right under the Hidden Boxes.
5. Do not touch the 9-marble Dark Blue, Yellow, or Red blocks. Not one of them.
6. Feed the singles into their Boxes. Clearing this front row scrolls the receiver board up and starts ticking the Tunnel counter down.

Mid-game: release the giants

The second receiver row activates and suddenly Dark Blue and Red Boxes are everywhere. The board is finally ready for the heavy lifting.

7. Drop the 9-marble Dark Blue block from the bottom left. With Dark Blue Boxes live, the whole stack drains off the belt without a jam.
8. Send the 9-marble Red block down right behind it. Let the animations finish so the belt stays clean.
9. The Tunnel counter hits 0 and spits out a huge Pink block. Park it — Pink has no Box yet.
10. Your earlier right-side pulls have triggered the Hidden Boxes. The question marks flip and reveal fresh Light Blue and Light Green stacks.
11. Check belt pressure. A stray Light Blue or Dark Blue marble or two is fine — just wait for the Boxes to rotate instead of forcing anything.

Cleanup: catch the Pink, finish the tray

The receiver row shifts again, bringing Pink, Light Blue, and Yellow Boxes to the front.

12. Release the parked Pink block from the Tunnel. The Pink Boxes swallow the entire cluster and free up half the board.
13. Tap the revealed Light Blue and Light Green marbles from the old Hidden Box slab straight into their waiting Boxes.
14. Drop the last giant — the 9-marble Yellow block in the bottom middle.
15. Feed any leftover singles down the belt to close out the final Boxes. Tap slowly at the end; overloading the belt during the last clear animations is the only way to lose from here.

Level 20 Tips Recap

• Big block plus no matching Box equals instant jam. The giants always go last in their color group.
• Every front-row clear does double duty — it scrolls the Boxes and ticks the Tunnel toward its Pink payload.
• When the Tunnel fires, park the Pink block calmly. Its Boxes are only one scroll away.