Marble Sort Level 178 — Walkthrough and Solution

Level 178 is the double mystery box trap. Blind drops and a missing color make this level a test of patience, but the key is ignoring the bait and drilling vertically.

Level178
DifficultyMedium
Priority routeGreen → Orange
Watch forGreen

▶ Video walkthrough of Marble Sort level 178, then the step-by-step below.

⚡ Quick clear

Green → Orange. Hidden boxes turn every tap into a guess.

Marble Sort Level 178 throws a wall of Mystery Boxes at you, hiding nearly every marble and even the receiving area. The winning strategy is to ignore the tempting free colors, focus on the visible matches, and carefully dig through the unknown blocks while using the Conveyor Belt as a buffer.

The visible bottom row of the top grid shows Green, Orange, Light Blue, Mint Green, and Dark Blue from left to right. The lower columns start with Black, Dark Blue, Mint Green, and Dark Blue, but everything else is a question mark.

Marble Sort Level 178 Walkthrough

At the start, the four bottom columns demand Black, Dark Blue, Mint Green, and another Dark Blue. The leftmost Black column has no visible Black marble above, and the two Dark Blue columns only have one visible Dark Blue matching them, so you must uncover hidden ones.

The real trap is the trio of Green, Orange, and Light Blue blocks on the lower left of the top tray. They look harmless but have no corresponding bottom boxes early on, so dropping them will clog your Conveyor Belt and ruin your run.

How to Beat Marble Sort Level 178 — Step-by-Step

Phase one: Expose the first hidden layers

  1. Tap the visible Mint Green block on the bottom row and feed it into the Mint Green Box.
  2. Tap the visible Dark Blue block on the far right and route it to one of the Dark Blue Boxes.
  3. Leave the Green, Orange, and Light Blue blocks untouched; they are decoys.
  4. Now that the bottom row has gaps, tap the Mystery Boxes directly above those spots to reveal new colors.
  5. If you uncover Black, drop it into the Black Box immediately to clear that column.
  6. If you uncover another Dark Blue, slide it into the other Dark Blue Box to complete it.
  7. If you reveal Pink, Purple, or Red, let it rest on the Conveyor Belt and keep digging in the same column until you find what you need.

Phase two: Clear the waiting room and release the hostages

  1. As you clear the initial boxes, new Mystery Boxes rise up in the bottom columns, often demanding Pink, Purple, or Red.
  2. Check your Conveyor Belt for any marbles you parked earlier; if their matching boxes have appeared, let them slide in and empty the belt.
  3. Now that the midgame boxes are out, the Green, Orange, and Light Blue boxes will appear. Drop those long-ignored marbles to clear them and open up the left side of the top tray.
  4. Pick one vertical column in the top tray and clear it from bottom to top, exposing multiple Mystery Boxes at once for better planning.
  5. When tapping unknown blocks, always ensure you have at least two empty spots on your Conveyor Belt as a safety buffer.

Phase three: Clear the top rows and finish

  1. By the time you reach the upper rows, most Mystery Boxes will be gone, and you can see the remaining Pink, Purple, and Red marbles clearly.
  2. Match the last few bottom columns by hunting for their required colors in the top tray.
  3. Drop the final marbles into their boxes, and the level will complete as the board empties.

Tips & tricks

  • Never tap a Mystery Box when your Conveyor Belt is full; you need space for a possible wrong color.
  • Always clear the visible Mint Green and Dark Blue first to create empty slots for digging.
  • Drill one column at a time instead of skimming rows to reveal more blocks and reduce guesswork.

Common mistakes

  • Dropping the Green, Orange, or Light Blue marbles early because they look free – this jams your belt.
  • Randomly tapping across the top tray instead of systematically clearing a column.
  • Ignoring the Conveyor Belt space and tapping a Mystery Box when you have no room to hold a bad color.

Marble Sort Level 178 FAQ

Why does my Conveyor Belt flood on Marble Sort Level 178?

Your belt floods because you tap the free Green, Orange, or Light Blue marbles too early, or you blindly tap Mystery Boxes without space, leaving no room for the wrong colors you uncover.

Which color do I clear first on Marble Sort Level 178?

Clear Mint Green first, then Dark Blue, because they are the only visible matches at the start and create the empty slots you need to begin digging for Black and more Dark Blue.

How many moves does it take to clear Marble Sort Level 178?

It typically takes around 80 to 100 moves, but the exact count varies based on which hidden colors you reveal and how efficiently you manage your Conveyor Belt.

Do I need boosters to beat Marble Sort Level 178?

No, boosters are not required if you follow the strategy of ignoring the bait, using the belt wisely, and drilling vertically to expose the hidden Black and Dark Blue marbles.

What happens if I drop the free Green, Orange, or Light Blue marbles early on Marble Sort Level 178?

Dropping them early fills your Conveyor Belt with colors that have no matching boxes, leaving no space for the random Pink, Purple, or Red marbles you'll uncover while digging, which often leads to a dead end.

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