Marble Sort Level 12 trips you with a row of Blue Boxes and barely any Blue to fill them. Pink, Blue, Green, Black, Orange, and Purple are stacked in a jagged grid, and a Tunnel marked 3 on the right is hoarding the sets you'll want later. This one is a space-management grind while you dig for colours you can't see yet.
The tray's bottom row, left to right, is Black, then Pink, then Green, then Blue — and it blocks everything above. One row back sit Green, Black, Purple, and a second Blue, while the top-left corner is gone entirely, leaving a pile of Orange and Purple you won't touch until the end.
Marble Sort Level 12 Walkthrough
Across the bottom you're facing Blue, Black, Blue, Blue — three Blue slots and one Black, against a lone reachable Blue on the bottom-right. That's the bait. The board nudges you to dump Pink and Green just to see behind them, but doing it early floods the belt and leaves its left side as a dumping ground for stray Pinks.
How to Beat Marble Sort Level 12 — Step-by-Step
Break the opening Blue jam
- Tap the bottom-left Black into the second column's Black Box. Clearing it lifts a Blue Box into view.
- You now have four Blue Boxes lined up across the front.
- Tap the bottom-right Blue to fill one of them.
- You're hemmed in by Pink and Green with no Box for either, so park both on the belt on purpose.
- That exposes the next row. Grab its Black and hold it — or feed it if a Black Box has come forward.
- Drop that second-row Blue to clear another Blue Box up front.
Trigger the Tunnel
- The right side opens and the Tunnel fires, releasing a run of Pink onto the board.
- The second layer is now showing, with Pink, Green, and Orange targets leading.
- Route the Tunnel's Pink into the Pink Box that has surfaced in the first column.
- The belt will look scary — leftover Blue, Green, and a stray Pink all parked. Ride it out.
- Tap the exposed Green to fill the Green Boxes sitting in columns three and four.
- Those Green clears drag the right side forward and uncover a crucial Black Box in the fourth column.
Clear the hidden Purple and Orange
- With the front rows spent, the deepest layers rise and Purple and Orange Boxes take the lead.
- Drop the Orange from the top-left to clear column two's Orange Box.
- What's left in columns one, three, and four is all Purple, so pull the Purple from the top and middle rows to fill them.
- Feed the last Black set into the final Black Box to empty the board.
Tips & tricks
- Black is the opening key — it's the only front-row match that clears a Box without touching bait.
- Parking Pink and Green is a controlled sacrifice, not a panic; it's the intended route.
- The Tunnel's Pink drop is the midgame rescue — time it to column one's Pink Box.
Common mistakes
- Dumping Pink and Green too early, before the Black clears. The belt fills and strands you.
- Ignoring the revealed Black Box in column four, which is what lets the right side finally move.
Marble Sort Level 12 FAQ
Why does my Conveyor Belt flood on Marble Sort Level 12?
You dumped Pink and Green before clearing the Black Box, so the belt filled with colours that had no home. Clear the bottom-left Black first, then make the Pink and Green sacrifice.
Which color do I clear first on Marble Sort Level 12?
Black, on the bottom-left. It clears column two's Black Box and reveals a Blue Box behind it, giving you a real opening without touching the bait.
How many moves does it take to clear Marble Sort Level 12?
Roughly eleven taps across three phases — the Black and Blue opening, the Tunnel's Pink drop, then the hidden Purple and Orange cleanup.
Do I need boosters to beat Marble Sort Level 12?
No. Clear Black first, park Pink and Green, and let the Tunnel deliver the Pinks. Save boosters for boards with hidden Boxes or locks.
What happens if I dump Pink and Green too early?
They land on the Conveyor Belt with no matching Boxes and the left side becomes a dead zone of stranded Pinks, jamming the run before the Tunnel even opens.
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