Why must cyan 140 and 73 run alone first?

They occupy holes for a long time, and the next phase needs free capacity for linked brush cards and four different lock colors.

How should the four locks be handled?

Expose one lock at a time, route its released color, and only then open the next lock.

Colony Flow! level guide

hard 7 colors

Drain the puppy's cyan sky with 140/73, then reserve a hole for each of four color locks before the dark 70, cyan 115 and green grass waves.

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Tap cyan 140 and cyan 73, then wait for the two sky streams to make a full perimeter pass.
Use the first returned hole for orange 9 linked to yellow 9; keep the remaining holes open for lock releases.
Clear each released red, yellow, cyan or green card before opening the next colored lock.
Route green 8 linked to dark 70 only after the short brush-color cards have returned.
Alternate white 30/40 with cyan 84 and dark 53 as the puppy's face and body separate from the sky.
Send green 35/55/70 in controlled waves across the grass, never beside both cyan 115 and dark 70.
Use short white 1/5/12/22 and green 1/5/19/32 cards to turn holes over between long body routes.
Finish cyan 94/115, dark 25/53 and the last white puppy fragments, then wait for the frame to empty.

Colors in this level:

Cyan, White, Green, Dark purple, Orange, Yellow, Red

Opening two locks while cyan 115 or dark 70 occupies the tray leaves a released color without a hole.
Stopping after the grass clears leaves the white puppy body, cyan sky corners and dark outline active.

Reserve a hole before exposing every colored lock.
Do not start dark 70 while both cyan openers are active.
Use the 1-22 count body cards to turn holes over between long sky and grass waves.

Board notes 5 details

Layout: A white puppy with a dark outline sits in green grass beneath cyan sky beside a cup of colored paintbrushes. Five holes face cyan 140/73. Red, yellow, cyan and green locks sit above linked orange 9/yellow 9 and green 8/dark 70; deeper cards include white 30/40, cyan 84/115, dark 53/70 and green 35/55/70.
Goal: Drain the cyan sky, release all four locks, clear the grass and brush cup, then remove the puppy's white body and dark outline.
Opening: Tap cyan 140 and cyan 73 and wait for a full perimeter pass before routing the orange 9/yellow 9 brush chain.
Danger Zone: Cyan 140/84/115 and dark 70 last through lock transitions. Opening another lock without a spare hole strands its red, yellow, cyan or green release.
Mechanics: A sky-heavy board sequences four colored locks around linked brush cards and multiple 53-140 cube background and body routes.

Why must cyan 140 and 73 run alone first?
They occupy holes for a long time, and the next phase needs free capacity for linked brush cards and four different lock colors.
How should the four locks be handled?
Expose one lock at a time, route its released color, and only then open the next lock.