Marble Sort Level 337 Walkthrough & Solution

Level 337 Board Overview: The Locked Rails

Level 337 opens on a six-column tile tray sealed at both ends. The outer rails are nothing but numbered locks — 5, 3, and 2 markers stacked down each side with gaps between them — so the only playable tiles at the start live in the four middle columns. On top of that, the middle columns carry their own locks: down-arrow tiles cap columns three and four, hiding what sits beneath.

The visible columns are a mixed bag. The second column runs Brown over Blue over Blue over Yellow over Pink, with a Purple bubble crate planted at its base. The third holds White, Dark Grey, and Red arrow locks over Blue and Green tiles and a Green bubble crate. The fourth repeats White and Pink arrow locks over Dark Grey and Light Blue tiles, resting on a Light Blue bubble crate, while the fifth column stacks White, Yellow, Green, and Yellow over a Green tile and an Orange bubble crate.

The receiver Boxes below ask for seven colors: Yellow, Orange, Pink, and Green in the front rows, then Purple, Light Blue, and Brown behind them. That ordering decides everything — the colors you can feed safely in the opening are exactly the ones the early Boxes request.

The Trap in Marble Sort Level 337

The board is rigged to make you touch the wrong tiles first. Here is the layout:

• The outer rails are one giant lock: numbered 5, 3, and 2 markers run down both edges with empty gaps between them. They pay several tiles at once when freed, but only when a matching Box is in the front row.
• Down-arrow locks cap the middle columns: White, Dark Grey, Red, and Pink arrow tiles block the tops of columns three and four. You cannot see what they hide until you clear them.
• Bubble crates guard the column bases: Purple, Green, Light Blue, and Orange crates sit under the bottom tiles of columns two through five, so the last tiles of those stacks stay out of reach for most of the solve.
• Brown is early bait: the Brown tile caps the second column, but a Brown Box does not appear until the last row of receivers. Feed it early and it jams the conveyor with nowhere to go.

Marble Sort Level 337 Step-by-Step Walkthrough

Work the locks off in order and the rest of the board opens itself. Follow the release order.

Opening: crack the rails

1. Clear the numbered locks on the outer rails first — each 5, 3, and 2 marker drops its tiles the moment a matching Box sits in the front row.
2. Feed the Yellow tiles from the top of the fifth column into the front-row Yellow Boxes.
3. Tap the Pink tiles in the second and fourth columns into the Pink Boxes as they cycle forward.
4. Start peeling the down-arrow locks off columns three and four. The White, Red, and Pink arrow tiles release the stacks underneath once cleared.
5. Do not touch the Brown tile capping the second column, and leave the Purple and Orange tiles alone — none of them have a Box in the front rows.

Midgame: release the locks and the crates

Once the front row of Boxes clears, the receivers cycle toward Purple, Light Blue, and Brown, and the locked middle of the tray finally opens up.

6. Feed Purple as its Boxes arrive — the second column hides Purple at its base and more ride down the middle.
7. Drop the Light Blue tiles into the Light Blue Boxes; they sit low in the third and fourth columns.
8. Break through the bubble crates as their colors come into rotation — the Green, Light Blue, Orange, and Purple crates at the column bases release the last tiles of each stack.
9. Let the Dark Grey and Blue tiles buried mid-column drop into whatever Box cycles forward — they are not top priority, but they clear space in the tray.
10. Keep the conveyor fed with colors that have an open Box only. If a tile’s color has no receiver in the active rows, leave it on the board.

Cleanup: finish the stragglers

With the tray thinned out, the level becomes a straight finishing line. The end frame shows the last tiles still riding down the central chute into the remaining Boxes.

11. Every remaining tile is a single waiting for its Box to slide to the front — play only to the active front row from here.
12. Let the last Greens and Oranges drop as their receivers open; do not chase colors whose Boxes have already closed.
13. Finish the final Boxes as the stragglers land, and the level completes the moment the last tile drops into place.

Level 337 Tips Recap

• Crack the numbered rail locks (5/3/2) before chasing the middle of the tray — each one pays several tiles per drop.
• Only feed colors whose Box sits in the active front row; Brown, Purple, and Orange are bait until the midgame.
• The down-arrow locks cap the middle columns — clear them to open the stacks hidden underneath.
• In the endgame the tray is nearly empty; cycle the receivers and let the last stragglers fall on their own.