What are the gray cubes around Level 10?

They form the visible side rails around the colored inner grid; the observed route clears the colored groups that become exposed between them.

Does Level 10 use the buffer?

Yes. A green cube appears in slot one and later blue/red pieces occupy additional slots, so preserve the remaining capacity.

Cube Tap Sort level guide

hard 12 colors

Clear the colored grid inside the gray rails and protect buffer space as green, blue, and red pieces accumulate during the later phases.

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Confirm green star 2 and orange-red flower 2 and note the four empty buffer cells.
Clear the exposed green and orange-red groups, then follow the pink and purple/cyan targets.
Continue through lime/cyan and blue/lavender as the colored center reorients inside the gray rails.
After a green cube enters buffer slot one and blue pieces occupy additional slots, preserve the remaining space.
Clear the final yellow, peach, and red groups and wait for WELL DONE.

Colors in this level:

Green, Orange, Red, Pink, Purple, Cyan, Lime, Blue, Lavender, Yellow, Peach, Gray

Treating the gray rails as a target group or tapping through covered inner cubes.
Assuming the buffer resets when the framed board changes orientation.

Start with the green and orange-red target boxes shown above the frame.
Wait for inner cubes to become exposed instead of tapping through the gray rails.
Reserve buffer capacity after the first green cube and later blue pieces appear.

Board notes 5 details

Layout: The opening board is a colored inner grid framed by tall gray engraved rails. Green star 2 and orange-red flower 2 are active, with four empty buffer cells.
Goal: Advance through green/orange, pink, purple/cyan, lime/cyan, blue/lavender, yellow, and the final peach/red phases.
Opening: Release the exposed green star and orange-red flower groups before reaching into the framed inner rows.
Danger Zone: A green cube visibly enters buffer slot one, followed by multiple blue/red pieces. The gray rails and occupied slots persist while the center reorients.
Mechanics: The gray rails frame the playable inner grid and narrow the visible exits; the solve still depends on target order and finite buffer capacity.

What are the gray cubes around Level 10?
They form the visible side rails around the colored inner grid; the observed route clears the colored groups that become exposed between them.
Does Level 10 use the buffer?
Yes. A green cube appears in slot one and later blue/red pieces occupy additional slots, so preserve the remaining capacity.