Marble Sort Level 77 loves to bait an early loss. The wings look like easy money, but the real blocker is that huge cross in the middle of the Tray — nothing opens until you carve it out. You play blind through the middle and have to ignore the doubling mechanics on the wings until the lower board asks for them.
The Tray is a giant plus sign. The top arm holds three Tunnels marked with a 3, the center is a 2x3 block of Mystery Boxes, and the two wings hold easy colours — Pink, Green, Purple and White on the left, Blue, Orange, Pink and Green on the right — over bright green x2 gates. Your bottom Boxes want Cyan, Purple, Dark Red and Pink.
Marble Sort Level 77 Walkthrough
The wings are the bait. Drop the Orange on the right through the x2 gate now and you get a huge pile of doubled orange with no Box to catch it. Instead, map your opening colours to the safe center-bottom of the cross and completely ignore the gates.
Work the front line, tunnel into the hidden center, and touch the side wings only once the lower board actually asks for one of their colours.
How to Beat Marble Sort Level 77 — Step-by-Step
Bust the front line
- Tap the bottom-center line — Purple, Dark Red, then Light Pink — and set them free.
- Those three land straight in the mid-left, far-right and mid-right Boxes you start with.
- Tap the exposed Cyan just to the right of the Mystery Boxes for the far-left Box.
- As the Mystery Boxes above flip, read their colours and hold the wings.
Dig through the Mystery center
- When a fresh bottom Box rolls in and the centre can match it, pull from the 2x3 grid before the wings.
- Carve out that whole block — when the centre doesn't hold the colour, reach for the wings' inner edges instead.
- Never carry more than three spare marbles on the belt at once.
- Use an x2 gate only when a wing colour is demanded and the belt is nearly empty.
Open the top Tunnels
- Once the cross is cleared, tap the three Tunnels' front boxes — they dump Light Blue, White and Dark Red.
- Clear those drops immediately to pull the Tunnel numbers down.
- Mop up the leftover wing colours through the gates now that the board is mostly empty.
- Make sure the last drop doesn't double the wrong colour, then finish.
Tips & tricks
- Start at the center-bottom — Purple, Light Pink, Dark Red, then Cyan — and stay off the wings.
- Treat the x2 wings as off-limits until a wing colour is actually demanded below.
- Keep the belt at three dead marbles max while digging the Mystery center.
Common mistakes
- Dropping the Orange through the right x2 gate in the opening, doubling a colour with no Box.
- Ignoring the center and pulling the wings first, leaving the Mystery Boxes unread when the midgame hits.
Marble Sort Level 77 FAQ
Why does my Conveyor Belt flood on Marble Sort Level 77?
You pulled a wing colour through an x2 gate before its Box opened. The doubled marbles have no home and fill the belt fast.
Which color do I clear first on Marble Sort Level 77?
The Purple, Light Pink and Dark Red in the bottom center row. They feed the starting Boxes and start revealing the Mystery grid.
How many moves does it take to clear Marble Sort Level 77?
Three phases — bust the front line, dig the Mystery center, then pop the top Tunnels. Roughly a dozen careful taps.
Do I need boosters to beat Marble Sort Level 77?
No. Hollow out the center and respect the x2 gates. Boosters won't reveal a Mystery Box for you.
What happens if I use the x2 gate too early on Marble Sort Level 77?
The wing colour doubles onto a belt with no matching Box, filling two slots at once and jamming you before the midgame.
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