What is the cover order in Block Out Level 665?

The purple left tower opens first, the orange middle bridge opens second, and the red right tower is the final large reveal.

Why must the center shaft stay empty?

All three hidden waves descend through the same shaft, including the left yellow column and the late right-side red and pink pieces.

Block Out level guide

expert 7 colors

Level 665 builds a tall U from covers marked 7, 7 and 4; open left, middle and right while reserving the central shaft for every reveal.

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Send accessible cyan pieces toward the low cyan gates, separate the green-orange L pair and move the pink horizontal away from center.
Route small green pieces toward the side gates while the four-square green cluster remains below the orange bridge.
Continue lower-pocket exits until the purple 7-cover retracts, then pull its left-tower pieces down one at a time.
Send the yellow column toward the top-left gate, cyan blocks to cyan and pink pieces to the right/bottom pink gates.
Take the orange bridge to zero, then move its central green and red pieces down before turning the long green L.
Route orange right, red right and green through the open side lane while reducing the red 4-cover.
After the right tower opens, clear its top-right pieces through the shaft before returning the pink vertical to center.
Move the remaining green clusters and cyan bar through their side gates while the long pink vertical stays against the upper wall.
Send the pink vertical and orange/pink edge pieces through their matching gates to empty the board.

Colors in this level:

Purple, Red, Orange, Green, Cyan, Pink, Yellow

Parking the four-square green cluster in the shaft before the left purple tower retracts.
Triggering the red right cover while the long green L still spans the center.

Finish each reveal wave before taking the next cover to zero.
Keep the four-square green cluster below the orange bridge until the left tower is clear.

Board notes 5 details

Layout: A purple 7-cover fills the left tower, a red 4-cover fills the right tower and an orange 7-cover bridges the middle. Nested green/orange/cyan L shapes and pink/red/cyan pieces occupy the bottom pocket.
Goal: Reveal the left tower first, remove the orange bridge next and keep the shared shaft clear for the final right-tower wave.
Opening: Move cyan toward the low side gates, separate the green-orange L pair and pull the pink horizontal away from the shaft.
Danger Zone: A pink vertical or long green L parked between the towers blocks both the left yellow column and the final red/pink reveal.
Mechanics: Three covers marked 7, 7 and 4 retract left-to-middle-to-right into one U-shaped circulation path.

What is the cover order in Block Out Level 665?
The purple left tower opens first, the orange middle bridge opens second, and the red right tower is the final large reveal.
Why must the center shaft stay empty?
All three hidden waves descend through the same shaft, including the left yellow column and the late right-side red and pink pieces.