Marble Sort Level 99 Walkthrough Solution | Marble Sort 99

Marble Sort Level 99 Guide: The Left-Side Key Dig and Connected Box Trap

Marble Sort Level 99 is entirely controlled by a massive chain blocking half the board. You load in and immediately see a brutal split. The left side holds the key. The right side is completely locked down. Your dominant colors early on are Light Blue, Red, Green, and Dark Grey, but the board quickly shifts into Purple and Yellow chaos later.

This level is a test of your patience. The temptation is to start pulling loose marbles from both sides just to feel productive. Do that, and you fail. Your Conveyor Belt will fill up with useless colors while the ones you actually need remain trapped. To beat this stage, you must execute a highly specific excavation on the left side, grab that key, and then carefully untangle a nasty web of Connected Boxes that drop in the midgame.

The Split-Tray Lock Setup in Marble Sort Level 99

Look closely at the Top Tray. It is divided into two distinct towers. The right tower is held hostage by a giant padlock and chain.

The left tower is your only viable starting zone. The very bottom edge holds Red, Light Blue, and Green marbles. Sitting directly above them is a layer containing Dark Grey, Brown, and Light Pink. Above that sits a 3x3 grid of Hidden Boxes. The golden Key you desperately need is sitting right near the top-left corner of that hidden grid.

The right tower is pure bait. At the bottom, you have Orange, Green, and White marbles. Sitting right above them is the chained Lock, keeping a row of Purple and Light Blue marbles completely untouchable. Above the chain is another 3x3 grid of Hidden Boxes. If you tap the Orange or Green marbles on the right side early, you will instantly regret it.

Now look at your bottom Boxes. The front row dictates your opening moves. From left to right, you need to feed a Light Blue Box, a Dark Grey Box, a Red Box, and a White Box.

Look at the columns behind that front row. The far-left column is stacked deep with Green Boxes. The third column has a Light Blue Box hiding behind the Red. The right side has Brown and Light Pink buried deep.

The main trap in Marble Sort Level 99 is the Conveyor Belt squeeze. Because the right side of the Top Tray is locked, you have limited access to colors. If you pull a color that does not immediately drop into the front row of bottom Boxes, it sits on your Conveyor Belt and blocks traffic. You must systematically feed the front row using only the left side of the tray until that Key drops.

Marble Sort Level 99 Step-by-Step Walkthrough

Follow this exact order to safely break the lock and survive the midgame shift. Do not deviate, or your belt will jam.

Digging for the Key in Marble Sort Level 99

Your entire opening game revolves around one thing: a massive dig operation on the left side of the Top Tray. Do not even look at the right side yet.

1. Clear the immediate front line: Tap the Light Blue marbles on the bottom edge of the left tray. Send them straight into the far-left front Light Blue Box.
2. Knock out the Red: Tap the Red marbles sitting on the bottom left. They will drop straight into the Red Box sitting in the third column.
3. Hold the Green: You have Green marbles exposed on the left, but do not pull them yet. Wait until the front Light Blue Box clears. Once it clears, it reveals a massive stack of Green Boxes underneath it. Now you can safely send your Green marbles down.
4. Process the second layer: With the bottom edge clear, you now have access to Dark Grey, Brown, and Light Pink. Send the Dark Grey marbles to the second column Box.
5. Peel back the Hidden Boxes: You finally have access to the bottom row of the 3x3 Hidden Box grid on the left. Tap them one by one. Only pull colors that match the active front row of your bottom Boxes.
6. Grab the Key: Keep digging upward through that left-side grid. The Key is sitting near the top left. The second you clear the Hidden Box holding it, the Key will fly over and shatter the Lock on the right side of the tray.

Managing the Connected Boxes in Marble Sort Level 99

The chain is gone. The board cracks open. But this is exactly where Marble Sort Level 99 gets dangerous.

When you break the Lock, you expose a row of Purple, Light Blue, and Purple marbles on the right side of the Top Tray. At the exact same time, your bottom Boxes shift, and a massive trap drops in.

1. Identify the new threat: Look at your lower Boxes. You will now see Connected Boxes. The second column has a Purple Box tied by a heavy black line to another Purple Box sitting behind it in the third column. The fourth column has a Light Blue Box connected to another Light Blue Box.
2. Clear the trash first: Do not immediately tap the newly exposed Purple marbles. The front row of your Boxes likely has Dark Grey blocking the way. You must use the remaining visible marbles to clear these frontline blockers first.
3. Feed the Purple chain: Once the Purple Connected Box shifts to the front, carefully tap the Purple marbles from the right side of the Top Tray. Because they are Connected Boxes, clearing the front one will automatically drag the back one forward. Do not overload your Conveyor Belt with extra colors while this animation happens.
4. Tackle the Light Blue chain: Repeat the exact same process for the right-side Light Blue Connected Boxes. Feed them steadily. Keep your belt lean.

Clearing the Final Hidden Grids in Marble Sort Level 99

You have survived the midgame. The Connected Boxes are gone. Now you just have to clean up the rest of the board without making a silly mistake.

1. Open the right-side grid: You now have full access to the 3x3 Hidden Box grid on the top right. Start tapping the bottom row to reveal their colors.
2. Watch the late-game colors: As you clear the deeper bottom Boxes, you will see Light Pink, Yellow, and Blue Boxes appear. Do not pull a Light Pink marble from the top unless the Light Pink Box is actually in the front row.
3. Empty the left side: You likely have a few loose Light Pink or Dark Grey marbles lingering on the far left of the Top Tray. Snipe them down whenever their matching Box pushes to the front.
4. Final flush: Keep tapping the right-side Hidden Boxes. Match them carefully with the final Yellow and Red Boxes at the bottom. Never pull more than three unmatched marbles onto the Conveyor Belt. Finish the sorting and claim the win.