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Marble Sort Level 84 Solution: Lock and Key Mystery Trap

Easy ★☆☆☆☆ ~16 moves

Screenshots

Marble Sort Level 84 screenshot 1Marble Sort Level 84 screenshot 2Marble Sort Level 84 screenshot 3Marble Sort Level 84 screenshot 4

Step-by-step solution

Quick answer
  1. 1) Tap the Red arrow near the top left of the tray to begin feeding the Red receiver sitting in column one.
  2. 2) Tap the Blue arrow in the upper right of the left-side grid to feed the Blue receiver in the fourth column.
  3. 3) Move past the vertical divider and tap the Lime Green arrow to fill the Lime Green receiver in the third column.
  4. 4) Only touch a gray mystery block when you hold at least three free slots on the belt, and aim at the blocks directly below or beside the gold Key.
  5. 5) Drop the gold key down and skip the big Yellow 9-marble cluster on the lower right until the key clears.
  6. 6) Once the chain releases, do not instantly dump the just-freed Red or White 9-marble clusters; empty the Yellow receiver in column two with the bottom-right Yellow cluster and use the Pink, Blue, Cyan, Green arrows for the second layer.
  7. 7) Once the White receiver in column four becomes active, tap the unlocked White 9-marble cluster on the bottom left so it drops cleanly, then tap the unlocked Red 9-marble clusters to fill the active Red columns.
  8. 8) Empty the Lime Green receiver in column three using the bottom-right Lime Green cluster, then finish the final row of Red, Blue, Yellow, and White boxes using whatever the last Mystery Boxes expose.

Level 84 Lock and Key Mystery Trap

sphere Sort Level 84 throws one huge visual roadblock at one the moment the board loads.

one look at this bottom west from this top play area plus see a thick iron chain.

One big padlock secures this line directly over three massive 9-marble clusters.

This instantly dictates your entire strategy.

one can't simply sort colors at your own pace.

this dominant shades over this board sit crimson, azure, gold, plus Lime emerald, but one shall quickly notice how badly they are blocked.

this upper tier from the lower receptacles requires crimson, Yellow, Lime Green, and Blue.

this problem sits that half from those shades sit either stuck under gray secret Boxes or trapped behind that massive chain.

If one choose this bad arrows first just into empty room, the Conveyor track will jam before the padlock ever opens.

Level 84 Locked Chain pattern

Every single choose matters on this specific board layout.

one hold into understand exactly where this shades live before you make your first move.

that features one dense, layered grid of arrow blocks.

this upper line gives one access into Cyan, Red, and Blue downward arrows.

Row three provides Pink, Cyan, and Green.

those sit the just predictable opening moves on the left side.

Directly beneath those arrows sits the trap.

secret cases span the middle of the left grid.

one hold zero idea what shades they hold until this block in front of them drops.

Below those secret pieces sits this defining obstacle of Marble Sort Level 84.

One huge line plus seal plus pass mechanism seals off three huge 9-sphere cases: one crimson case, a White box, and another Red box.

one can't touch these until the lock is broken.

Now scan this right side of the Top Tray .

One tall wall totally separates this east column from the main left grid.

At this very upper right sits a gold Key block.

Below this pass area, one hold individual pointer pieces with Lime emerald, Pink, Blue, Cyan, Green, and another Pink.

atlast, at this very lower east, here sit two exposed 9-sphere boxes: one Yellow and one Lime Green.

this bottom cases —this receptacles one should fill into empty this level—dictate your required order of play.

lane one holds crimson, Light Pink, Lime Green, and Red.

lane two stacks Yellow, Yellow, Pink, and Blue.

lane three hides Lime emerald, Blue, Red, and Yellow.

lane four contains Blue, White, Pink, and White.

this upper ready line from those cases currently demands crimson, Yellow, Lime Green, and Blue.

this crimson plus azure sit easily accessible from the top-left arrows.

this Lime emerald is ready on the right side.

here sits one huge gold 9-marble box on the bottom right.

Tapping that now shall flood this Conveyor track since this gold lower case only needs a few marbles to clear.

this excess shall sit over this track, eating onto crucial room as one try into dig through this Mystery Boxes to find the key.

Level 84 Level Overview

the entire opening phase is a rescue mission.

one should ignore this locked huge cases over this lower west plus focus fully over unearthing this gold key on the top right.

Level 84 Grabbing the Key

Do not choose the large 9-marble clusters yet.

one want into carve one path through this top arrows to activate the bottom receptacles.

choose this crimson pointer over the top left of the Top Tray .

This sends spheres down into start filling this Red bottom Box in the first column.

choose this azure pointer over this top right of the left-side grid.

This targets this Blue bottom Box in the fourth column.

Move into the right side of the vertical divider.

choose this Lime emerald pointer into route this Lime emerald bottom Box in the third column.

one want space before you touch the gray blocks.

just hit one secret piece if one hold at least three available slots on your belt.

one want into empty the layer immediately beneath the top arrows.

Target this pieces directly under or adjacent into the gold Key on the top right.

the sole objective sits into drop the key down so it clears.

Ignore this big gold 9-marble box on the lower right.

If one secret case uncovers one gold sphere, let that fill this active Yellow bottom Box instead.

Level 84 Surviving the Chain Release

this board drastically changes this second the key clears.

Suddenly, one hold access into one huge payload from crimson and White marbles on the bottom left.

Do not right choose this newly unlocked crimson or White 9-marble boxes.

this second tier from receptacles requires Light rose, Yellow, Blue, and White.

If this ivory lower case on lane four sits not fully exposed plus ready, do not touch this locked White 9-marble cluster.

Nine ivory marbles will spill onto the Conveyor Belt .

using zero ready case into catch them, they shall permanently jam your game.

empty this gold case over this second lane via tapping this 9-sphere gold case over the lower right of the Top Tray .

since this second tier requires gold, this is now a safe move.

Use this remaining arrows over this east side (rose, azure, Cyan, emerald) into feed the second layer of bottom Boxes .

Once this ivory receptacle sits ready on lane four, choose this unlocked ivory 9-marble box on the bottom left.

that shall cleanly drop and instantly clear the receptacle.

Level 84 Managing the 9-Marble Drops

this endgame sits all about matching this huge remaining groups into the deepest layers of the bottom receptacles.

this third line from lower Boxes requires Lime Green, Red, and Pink.

Now choose this unlocked crimson 9-marble boxes on the bottom left.

this ready crimson receptacles on lanes one plus three will catch the massive drop.

choose this Lime emerald 9-sphere case over this lower east into empty the Lime Green receptacle in column three.

empty out any remaining rose arrows from the top right column.

Finish this last line from lower cases (crimson, azure, gold, ivory) using whatever spheres were exposed behind the final Mystery Boxes .

Keep this track clean, just dropping exactly what this active bottom layer requests.

Frequently asked questions

How do I beat Marble Sort Level 84?

Feed the colors that already have an open bottom Box first, keep your belt from filling up, and only release a new color when a matching Box is ready. Follow the move order in the solution above and you can clear Level 84 every time.

What is the main trap to avoid on Marble Sort Level 84?

The biggest mistake on Level 84 is tapping a color that has no active bottom Box yet — those marbles park on your Conveyor Belt and eat limited slots. Hold back any color that has no receiver waiting and the stage stays under control.

What colors do I need to match on Marble Sort Level 84?

Level 84 mainly revolves around Gold, Green, Red. Focus on feeding Gold first when its Box is open, then introduce Green as the lower lanes free up so you never choke the belt.

How should I open Marble Sort Level 84?

Begin by checking the lower part of the tray and only select colors that already sit in an open Box down below. Clearing those first few matching blocks unlocks the rest of the board without jamming your sorting space.

How many moves does Marble Sort Level 84 take to complete?

Level 84 is a color-sequenced stage that clears cleanly when you stick to the exact order above. The step-by-step solution walks each move so you can finish it with the fewest taps and no wasted belt slots.

Is there a video walkthrough for Marble Sort Level 84?

Yes. The embedded video on this page walks through Marble Sort Level 84 move by move, and the screenshots below show each stage of the layout so you can follow along and beat it.