Marble Sort Level 378 is a tricky puzzle that hides its difficulty behind a deceptively simple setup. You must prioritize the single White marble first, then the Pink block, and only then tackle the Green block, while ignoring Yellow, Brown, and Purple until their matching boxes are exposed.
The board features a front row of heavy blocks: Yellow on the far left, Brown beside it, Green in the middle, and Pink on the right. A lone White marble sits isolated on the far right edge. Behind them, a jumble of singles includes Light Blue, Green, Brown, and Purple. Three blue Tunnels marked with a "3" are placed on the sides, and the bottom has four columns of boxes.
Marble Sort Level 378 Walkthrough
Your bottom columns from left to right are: White over Brown, Yellow over Pink, Green over Pink, and a double Pink stack. The Conveyor Belt has seven slots, and the trap is that tapping the big Yellow block early floods the belt with Yellow, jamming it because only one Yellow box exists at first.
The key insight is to use the double Pink stack to absorb the Pink block completely, then reveal a Green box underneath, allowing you to safely drop the Green block into two Green boxes.
How to Beat Marble Sort Level 378 — Step-by-Step
Phase one: Clearing the safe front marbles
- Drop the lone White marble from the far right edge into the White box on the far left.
- Release the Pink block from the front right; it fills the top Pink box and then the second Pink box, clearing both.
- After the Pink boxes vanish, a Green box appears underneath them in the far right column.
- Now tap the Green block; it fills the existing Green box in the middle right and the newly revealed Green box, clearing them.
Phase two: Handling the second wave
- After clearing the Green boxes, a new Pink box is exposed in the middle right column.
- Now you can safely drop the Yellow block because you have at least one Yellow box ready and the belt has room.
- As you clear boxes, watch the left Tunnel countdown; keep three belt slots free for when it activates.
- Before triggering new heavy blocks like Light Blue or Purple, clear the loose singles from the second row to cycle your boxes.
Phase three: Managing the endgame
- Wait until the right Tunnels have fully opened before dropping the massive Purple block.
- Clear the Light Blue singles to cycle the far left column.
- Finally, match remaining singles left to right, never letting more than four unmatched marbles sit on the belt.
Tips & tricks
- Keep your Conveyor Belt as empty as possible, especially before a Tunnel triggers.
- Always check how many boxes of a color are available before dropping a heavy block.
- Use the double Pink stack to your advantage early to open up the board.
Common mistakes
- Don't tap the Yellow block first; it will jam the belt.
- Don't ignore the single White marble; it's a safe first move.
- Don't drop heavy blocks without confirming you have enough matching boxes.
Marble Sort Level 378 FAQ
Why does my Conveyor Belt flood on Marble Sort Level 378?
Your belt floods when you drop a heavy block like Yellow without having enough open boxes to absorb all the marbles, especially if you haven't cleared the safe singles first.
Which color do I clear first on Marble Sort Level 378?
Clear the lone White marble first, then the Pink block, because the double Pink boxes can safely absorb it and reveal a Green box.
How many moves does it take to clear Marble Sort Level 378?
There is no fixed move count, but you should aim to finish in under 100 moves by following the optimal sequence of clearing White, Pink, Green, then Yellow, and managing the later blocks carefully.
Do I need boosters to beat Marble Sort Level 378?
No, boosters are not required if you follow the correct order and keep your belt clear, but they can help if you make a mistake early.
What happens if I tap the Yellow block first on Marble Sort Level 378?
If you tap Yellow first, the belt floods with Yellow marbles because only one Yellow box is available, jamming the belt and likely causing a game over.
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