Are the 5, 1, 2, and 4 objects tappable queues?

No. Their glass-backed values fall through completed receiver groups.

Where is the main capacity risk?

Mixed traffic fills all sixteen spaces before the middle and late cyan/green completions.

Open left purple-front to reveal burgundy first, center green-front to form purple second, and right cyan-front to form blue last.

Car Sort level guide

expert 11 colors

Car Sort Level 528 layers four completion countdowns and three key-front towers across a sixteen-space three-bend S-road.

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Dispatch purple from the short upper tray and route early cyan, red, orange, and pink.
Use the left purple-front key tower first; its unlock exposes burgundy, which becomes the first middle receiver, while lower-left orange stabilizes the bend.
Complete the first green group to begin reducing the top-left `5` glass stage.
Advance the center green-front key tower next; after its lock opens, that column becomes the purple receiver while lower orange, lavender, red, and cyan/pink stages settle.
Above `12/16`, expose only one keyed or hidden layer before waiting for a receiver drain.
Advance the upper horizontal tray through green and white reveals into its solid pink receiver.
Use completions to lower the `5` and `4` stages through their later values while the separate `1` and `2` gates clear.
Open the right cyan-front key tower last; its late unlock converts that column into the blue receiver, then complete top green, yellow, and white while pausing again at `16/16`.
Finish lower lavender, red, and cyan, then route the last orange and green pairs.
Verify every receiver is checked and the occupancy display reaches `0/16` with `Well Done!` feedback and the completion card.

Colors in this level:

Purple, Cyan, Red, Orange, Pink, Burgundy, Green, Yellow, White, Blue, Lavender

Board notes 5 details

Layout: Four top towers, one short upper horizontal tray, three key-front middle towers, and four lower towers feed one `0/16` S-road with eleven tall groups plus one horizontal group.
Goal: Open the keyed middle bank, reduce glass stages marked `5/1/2/4`, and complete every top, middle, lower, and horizontal receiver.
Opening: Route upper-tray purple with exposed cyan, red, and orange so burgundy and orange receivers stabilize the first two bends.
Danger Zone: The road reaches `16/16` during both the mixed middle phase and late cyan/green phase; another reveal at that point blocks the S-road.
Mechanics: Four completion-driven glass counters coexist with purple, green, and cyan key-front towers and a multi-stage horizontal tray.

Are the 5, 1, 2, and 4 objects tappable queues?
No. Their glass-backed values fall through completed receiver groups.
Where is the main capacity risk?
Mixed traffic fills all sixteen spaces before the middle and late cyan/green completions.
What is the keyed-tower order?
Open left purple-front to reveal burgundy first, center green-front to form purple second, and right cyan-front to form blue last.