Marble Sort Level 78 is a nightmare of restricted space. A 32-clear Panel dominates the top-left, so you clear 32 bottom Boxes before those marbles even see light. The early colours are Cyan, Black, Green and Red, but the board only gives you the center and right side to work with, and the belt is brutally tight.
The front row under the Panel holds Blue, Cyan and Brown marbles, the center is choked by two Tunnels marked with a 4 over Green, Black and Pink, and the top right has a 3x2 grid of Mystery Boxes over Red and Dark Red. Your bottom Boxes want Cyan, Cyan, Black and Green, then Black, Blue, Red and Blue.
Marble Sort Level 78 Walkthrough
The right side looks open and tempting, but hitting a Mystery Box without an open Box to catch that colour clogs the belt instantly. Play front-to-back and answer the bottom Boxes strictly. The Tunnels drop from 4 to 3 as you clear beneath them, so let that happen naturally.
Ignore the 32 Panel for now — you can't touch it until the front lines break.
How to Beat Marble Sort Level 78 — Step-by-Step
Open the choke points
- Grab the Cyan in the second column, then the Cyan in the fourth column, for the two Cyan Boxes.
- Pull the Black in the third column (under the left Tunnel), then the Black behind where the first Cyan was.
- Grab the Green in the center for the far-right Box.
- Leave the Mystery Boxes on the right alone entirely.
Survive the Mystery Box squeeze
- Pull the exposed Blue marbles on the far left and right center for the new Blue Boxes.
- Tap exactly one Mystery Box when you need Red or Pink, and route whatever drops into a matching Box.
- If a Mystery Box spits out Dark Red or Brown, leave it on the belt — don't panic-tap another.
- Keep pulling matching colours from the center to grind the Tunnels down, and push for 32 clears.
Break the Panel and clean up
- At 32, the Panel shatters and dumps Green, Brown and Dark Red clusters into play.
- Prioritise clearing whatever is sitting on your belt against the new bottom Boxes.
- Pull the remaining Brown and Green clusters from the top left, then the last Dark Reds to finish.
Tips & tricks
- Only tap a Mystery Box when you have an open Box to catch its colour — otherwise it's a jam.
- Let the center Tunnels tick down naturally as you clear beneath them.
- Ignore the top-left Panel completely until the front lines break.
Common mistakes
- Tapping a Mystery Box to see what's inside with no open Box, clogging the belt instantly.
- Forcing pulls just to lower the Tunnel count instead of letting it happen as you sort.
Marble Sort Level 78 FAQ
Why does my Conveyor Belt flood on Marble Sort Level 78?
You hit a Mystery Box with no open Box to catch its colour. Play front-to-back and only tap a Mystery Box when a home is ready.
Which color do I clear first on Marble Sort Level 78?
The two Cyans, then Black, then Green. That clears the front row and starts the 32-clear grind on the top-left Panel.
How many moves does it take to clear Marble Sort Level 78?
Thirty-two clears to break the Panel, plus cleanup. Answer the bottom Boxes strictly and the count falls steadily.
Do I need boosters to beat Marble Sort Level 78?
No. Front-to-back play and careful Mystery Box taps get you through. Boosters won't fix a belt jammed by a blind Mystery pull.
What happens if I tap a Mystery Box too early on Marble Sort Level 78?
It drops a colour with no matching Box, so that marble sits on the belt and blocks your space before the front line even clears.
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