Marble Sort Level 20 — Walkthrough and Solution

Level 20 is the hidden box trap and 9-block squeeze. Three giant stacks of Dark Blue, Yellow, and Red look ready to drop but they're decoys — pull the lone Green, Red, and Light Green singles first, then the big blocks.

Level20
DifficultyEasy
Priority routeGreen → Blue
Watch forGreen

▶ Video walkthrough of Marble Sort level 20, then the step-by-step below.

⚡ Quick clear

Green → Blue. The belt floods fast. Keep one lane open.

Marble Sort Level 20 punishes anyone who chases the big obvious drop. Green, Red, Pink, and Dark Blue run the board, a Tunnel marked 3 is locked on the far-left, and a 2x3 block of Hidden Boxes sits out of reach on the top-right. The real snare is the tray's bottom row, where three fat 9-marble stacks — Dark Blue, Yellow, and Red — sit in your path, looking ready to fall.

The front Boxes want Green, Red, and Light Green, so anything else stays put. The left side is a tangle: lone Green and Dark Blue marbles sit under the Tunnel, blocking a huge Dark Blue block. The middle keeps Pink, Light Blue, and Red singles above giant Yellow and Red stacks. The right side tucks Light Green, Green, Light Blue, and Red singles under the Hidden Boxes.

Marble Sort Level 20 Walkthrough

The trick is that the huge Dark Blue and Yellow stacks only look droppable. Tap one and nine unplayable marbles hit the belt, which can't hold a full 9-stack while you hunt for singles. Go front-to-back: clear the lone Green, Red, and Light Green first, and the front Boxes scroll up to show a wall of Dark Blue and Red. Only then do the big clusters become safe.

How to Beat Marble Sort Level 20 — Step-by-Step

Snipe the front line

  1. Pull the lone Green from the middle-left column.
  2. Grab the lone Red sitting in the middle columns.
  3. Pick off the lone Green and Light Green on the right, just beneath the Hidden Boxes.
  4. Leave the giant Dark Blue, Yellow, and Red stacks at the bottom alone — dropping them now ends the run.
  5. Feed those singles into the Boxes to clear the first row, which shifts the board up and starts the Tunnel counter.

Manage the Dark Blue flood

  1. The second row goes live with several Dark Blue and Red Boxes waiting.
  2. Drop the big Dark Blue stack from the bottom-left; the active Boxes swallow it quickly.
  3. Follow with the big Red stack, letting each animation finish so the belt stays clean.
  4. The top-left Tunnel hits zero and coughs up a large Pink block. Set it aside for a moment.
  5. Those right-side singles you pulled earlier flipped the Hidden Boxes, exposing Light Blue and Light Green.
  6. Any leftover Light Blue or Dark Blue will rotate out on its own, so stay calm.

Clear the Hidden Boxes

  1. The Boxes shift once more, and Pink, Light Blue, and Yellow lead the front.
  2. Release the big Pink block from the Tunnel; the Pink Boxes absorb the whole cluster.
  3. Tap the Light Blue and Light Green now showing where the Hidden Boxes were, into their Boxes.
  4. Clear the last big Yellow stack from the bottom-middle.
  5. Send any remaining singles down to finish, easing your tap speed so the belt doesn't overload during the final animations.

Tips & tricks

  • Green, Red, and Light Green are the whole front-line checklist — nothing else earns a tap.
  • Treat the 9-marble stacks as held weapons; they're safe only once the second row exposes their Boxes.
  • The Tunnel's Pink drop is a late gift — don't release it until Pink Boxes are at the front.

Common mistakes

  • Tapping a giant Dark Blue or Yellow stack at the start. Nine unplayable marbles clog the belt instantly.
  • Rapid-firing at the very end while the final clears still run, overloading the belt.

Marble Sort Level 20 FAQ

Why does my Conveyor Belt flood on Marble Sort Level 20?

You tapped one of the giant 9-marble Dark Blue or Yellow blocks before its Box was open, dumping nine unplayable marbles onto the belt. Clear the singles first.

Which color do I clear first on Marble Sort Level 20?

The single Green, Red, and Light Green marbles, in that order. Clearing those singles scrolls the front Boxes up and makes the big clusters safe to drop.

How many moves does it take to clear Marble Sort Level 20?

Around twelve taps across three phases — the singles sniping, the Dark Blue and Red flood, then the Tunnel's Pink and the Hidden Box cleanup.

Do I need boosters to beat Marble Sort Level 20?

No. Clear the singles front-to-back and the big blocks sort themselves. Save boosters for boards with hidden Boxes or locks.

What happens if I tap a giant block early?

Nine unplayable marbles hit the Conveyor Belt at once, clogging it before you can clear the front line. Hold the big blocks until their Boxes surface.

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