Marble Sort Level 123 Walkthrough & Solution

Level 123 Board Overview: The Crate-Walled Center

Level 123 opens with the Top Tray split down the middle. Four columns stretch across the board, but only the two inner ones are playable at the start: a pair of wooden crates, X-braced and stacked two high, seals the left column and the right column almost all the way down. Peeking out at the base of each wall is a single marble - all you get to see of those columns until the crates give way.

Between the walls, the two center columns hold the marbles that matter. Each one stands five tall: a dotted marble at the bottom, then White, Green, Orange, and Blue stacked above it. The funnel under the tray feeds everything onto a conveyor belt that carries each marble toward the receiver Boxes below - four box columns deep, with the active row taking deliveries until it fills and cycles away.

The board runs on nine colors: Blue, Orange, Green, White, Yellow, Light Blue, Pink, Purple, and Dark Green. The front row can only ask for four colors at a time, so everything else has to wait its turn on the belt.

The Trap in Marble Sort Level 123

The crate walls are only half the problem. The other half is the order your marbles arrive in.

• Two sealed columns: The outer columns are locked behind stacked X-crates. You get one base marble of sight each, and the rest of the column is hidden - and unreachable - until the midgame.
• Mixed center stacks: Each center column is a block of four different colors. You cannot pick selectively: the column feeds bottom-up, so the tray hands you a dotted marble, then White, then Green, then Orange, then Blue, in that order.
• Belt pacing: The conveyor moves one way. Release two colors back-to-back and they pile up on the belt with no matching Box in the front row; hold everything and the funnel jams. One marble in transit is the pace that wins.
• Late-game batches: Light Blue, White, Purple, and Pink arrive as long belt runs in the final third of the level. The last two boxes to lock are Green and Purple.

Marble Sort Level 123 Step-by-Step Walkthrough

Opening: feed the center stacks

1. Leave the crate-walled outer columns alone. Start with the left center column.
2. Release the dotted marble at its base; it rides the belt toward the first row of Boxes.
3. Let the White marble above it roll out next. Do not send the next marble until the one ahead is over a matching Box.
4. Drop the Green marble, then the Orange, then the Blue at the top of the stack, keeping the same one-at-a-time rhythm.
5. Repeat the bottom-up order on the right center column: dotted base, White, Green, Orange, Blue.
6. If two colors end up riding the belt together, hold the next marble at the funnel mouth until the belt clears instead of adding to the pile.
7. Watch the front row of Boxes cycle as deliveries land, and only send a color whose Box is active.

Midgame: the crate walls open

8. As the center columns empty out, the outer columns come alive: the crates stay planted, but the hidden marbles start to drop from behind them.
9. Blue, Purple, Pink, and Green spill out of the outer columns. Deliver each one to the row that asks for it as the Boxes cycle.
10. The belt starts running longer color strings now - let whole batches of Light Blue pass rather than fighting the flow.
11. Keep the White runs moving; they clear fast when a White Box is front and center.
12. Do not tap the last marbles of the tray just to clear the screen - a color with no active Box is a belt jam waiting to happen.

Cleanup: close with Green and Purple

13. With the tray drained, only the belt and the Boxes are left on the board.
14. The final deliveries are Green and Purple - the last two boxes, stacked in the right column, take Green and then Purple.
15. When the last Box locks, the Level Completed screen drops in and the level is done.

Level 123 Tips Recap

• The two center columns are your whole opening - never touch the crate walls until they open themselves.
• Take the stacks bottom-up: dotted base, White, Green, Orange, Blue, one marble at a time.
• One marble in transit beats a conveyor full of mixed colors.
• The finale is Green and Purple; only tap for the rows that are actually asking.