How many slots are usable at the start of Level 595?

Four are usable; the fifth square is crossed by chains until the later release.

What do the two wooden 3 blocks require?

They require the hammer tools revealed by the queue; their counters must be reduced before the covered picture areas can fully clear.

Food Hunt: Pixel Puzzle level guide

hard 12 colors

Manage teal 10, green 15, orange 5, and teal 15 under four slots, break both wooden 3 covers, and finish the empty frame.

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Fresh-tap teal 10, green 15, orange 5, and teal 15 into the four open slots; leave the crossed fifth square alone.
Let active green 25, yellow 10, and teal 8 drain; later green 18, green 10, teal 25, and blue 18 remain tied to their parent nests.
Admit charcoal 45, green 25/30, teal 15/25, orange 15/25, and visible blue families only after a real lane release; keep one lane ready for a tool or short color.
Send hammer icons to the two wooden 3 blocks. The upper counter becomes 2 early; do not treat any wood number as a color nest or fill every opening with long groups.
Leave purple ? and covered blue cells alone until their rows advance. After the fifth chain visibly opens, use the extra lane for revealed blue, cyan, cream, charcoal, and red fragments.
Let the late green 7, teal 16, cream 12, then green 3, teal 1, and charcoal 11 remainders resolve; around 500 seconds red 8, lavender 4, and central wood 2 still remain.
Continue the hammer/color cleanup until the central cover disappears, then wait through the blank frame around 585 seconds and confirm all five slots are empty.

Colors in this level:

Teal, Green, Orange, Charcoal, Purple, Blue, Cyan, Cream, Red, Yellow, Lavender, White

Using the chained fifth slot before its visible release.
Guessing the contents of purple ? or covered blue cells.
Treating hammer icons or wooden 3/2 counters as ordinary color nests and consuming a needed lane.

Count four slots until the chain visibly releases.
Reserve capacity for hammer tools and do not guess purple ? or covered blue nests.
The central wood is still 2 around 500 seconds; wait for the true blank frame.

Board notes 5 details

Layout: A cream animal-like figure with dark hair, a cyan/teal right-side shape, blue background, green ground, orange corner bands, and a central purple question-mark patch; two wooden 3 blocks cover the upper-left and center.
Goal: Clear the blue background, figure, dark outline, cyan shape, green ground, orange bands, mystery cover, and both wooden blocks until the frame is empty.
Opening: Only four slots are usable because the fifth is chained. Fresh teal 10, green 15, orange 5, and teal 15 lead the queue; charcoal 45, purple ?, green 25, charcoal 35, orange 15, covered blue, purple ?, and green 30 follow.
Danger Zone: Teal 15/25, green 15/25/30, charcoal 35/45, and orange 5/15/25 families compete for four lanes while covered blue, purple ?, and hammer tools wait.
Mechanics: Two wooden 3 covers require hammer tools; active green 25/yellow 10/teal 8 and later green 18/10, teal 25, blue 18 are remainders, and the fifth slot opens only after its chain release.

How many slots are usable at the start of Level 595?
Four are usable; the fifth square is crossed by chains until the later release.
What do the two wooden 3 blocks require?
They require the hammer tools revealed by the queue; their counters must be reduced before the covered picture areas can fully clear.