Which chamber should open first in Block Out Level 653?

Open the tall green-framed chamber on the left first; its pieces need the bridge above the still-closed orange chamber.

What is the Level 653 finishing color?

Cyan is the last family cleared, with the final cyan cluster leaving through the bottom gate.

Block Out level guide

expert 6 colors

Level 653 places two covers side by side beneath an L-packed crown, then turns the final third into a blue shell that unwinds from the edges.

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Send the top green block through the upper gate and the left yellow bar through the left gate, then shift the red crown bar away from the seam.
Slide the cyan horizontal right and lower the purple pieces into open cells before moving the outlined red L across the top.
Clear the left-side red, yellow and blue pieces so the green-framed cover opens, then route its outlined shapes through the left and bottom gates.
Keep the bridge above the orange cover empty while sending the long purple horizontal left and the cyan vertical toward the right gate.
Clear blocks along the orange cover's top and right edges; after it opens, remove the boxed lower-right red piece before using that corner again.
Send the revealed cyan verticals through the right and bottom gates, followed by the small red and purple pieces along the lower wall.
Unwind the final blue shell from the right edge inward, clearing the long cyan horizontal before the outlined red L near the crown.
Send the last cyan cluster through the bottom cyan gate to empty the board and trigger the Level 653 PERFECT card.

Colors in this level:

Green, Yellow, Red, Cyan, Purple, Blue

Parking the outlined red L on the single bridge between the two covers.
Refilling the lower-right corner before the boxed red piece has exited after the second reveal.

Board notes 5 details

Layout: A tall green-framed cover fills the lower left and a square orange-framed cover fills the lower right beneath red, yellow, green, purple and cyan crown pieces.
Goal: Release the left chamber before the right, keep their shared bridge clear, and route the late cyan/red compartment into the final blue-shell cleanup.
Opening: Send the top green piece upward and the left yellow bar through its gate, then move red and cyan blocks away from the seam above the covers.
Danger Zone: A purple horizontal or outlined red L left on the row above the orange cover blocks both the left reveal and the later right-side cyan pieces.
Mechanics: Neighboring covers share one bridge, multiple outlined L shapes turn around the crown, and the final shell is dominated by blue and cyan blocks.

Which chamber should open first in Block Out Level 653?
Open the tall green-framed chamber on the left first; its pieces need the bridge above the still-closed orange chamber.
What is the Level 653 finishing color?
Cyan is the last family cleared, with the final cyan cluster leaving through the bottom gate.