Why should the yellow lock be routed immediately?

Its short star or muzzle color opens while long green counter routes are still active, so delaying it can hold the next visible queue card.

What should follow the 400 gate?

Clear the lower muzzle and gate panel before returning to the face, tail and purple field.

Colony Flow! level guide

hard 6 colors

Break the star cat's 600/500/400 gates by opening green 66/66, dark, white 4 and green 35, then limit overlapping 95-110 green routes.

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Start green 66, green 66, dark and white 4; use green 35 only after a lane begins returning.
Use blue-purple 25 as the first support route, then yellow 35; wait before adding green 70.
Alternate green 70 and green 45 with blue-purple 40/50 while the 400 counter falls faster than the upper two.
As 400 nears zero, stop the long green queue and clear its short white/yellow release first.
Route the yellow-lock card when its key returns, then start green 95 with one hole still empty.
Clear the lower muzzle and gate panel with white, yellow and dark before returning to the green face.
Pair green 100 with a short purple or yellow card; wait for one before opening green 110.
Continue the 600 and 500 lanes with green 50/70 and blue-purple 40/50, retaining a release hole.
Remove the tail and face with separated green 95-110 routes, then route the yellow ears and dark whiskers.
Finish the purple starfield and final green crown pixels, then wait for Victory.

Colors in this level:

Green, Purple, Yellow, White, Dark purple, Blue

Running green 95, 100 and 110 together removes every release hole.
Clearing the lowest gate but ignoring the upper counters leaves the cat locked behind the starfield.

Never overlap green 95, 100 and 110.
Reserve one hole for each gate and the yellow lock.
Clear the short white and yellow release after the 400 gate before returning to the green face.

Board notes 5 details

Layout: A bright green cat with dark whiskers and yellow highlights sits on a purple starfield. Three gates begin near 600/500/400; five holes expose green 66/66, dark, white 4 and green 35 above green 70/45/50/95/100/110, blue-purple 25/40/50, yellow 35/55 and a yellow lock.
Goal: Break all three gates, then clear the purple starfield, green cat, yellow ears and stars, pale muzzle, dark eyes/whiskers and curled tail.
Opening: Tap green 66, green 66, dark and white 4, adding green 35 only when one stream is moving cleanly.
Danger Zone: Green 95/100/110 and purple 40/50 can fill every hole while a gate or yellow lock releases a short star or muzzle color.
Mechanics: A seven-minute triple-gate portrait pairs 600/500/400 counters with multiple 95-110 cube routes.

Why should the yellow lock be routed immediately?
Its short star or muzzle color opens while long green counter routes are still active, so delaying it can hold the next visible queue card.
What should follow the 400 gate?
Clear the lower muzzle and gate panel before returning to the face, tail and purple field.