What is the Level 12 picture?

It is an orange fox head with a black outline and white inner ears and cheek/muzzle patches.

Which Jelly colors and counts define the opening?

The visible opening queue shows black 10, white 40, and orange 30; the first white passes visibly show 28, 30, 23, 17, and 2 remaining hits.

The board empties and the video shows SUPERB!, followed by an EXTRA SLOT Unlocked! overlay.

Jelly Busters level guide

medium 3 colors

Clear the orange fox pixel picture by stripping its white ear and cheek layer, reusing white hits, and then finishing the black and orange fragments.

If the player asks you to sign in, open the video on YouTube instead.

Select white 40, then the next white queue Jelly; let the bottom-rail white pair remove the fox's ears and lower white face.
Reuse the white entries while their counters remain nonzero, following the visible 28, 30, 23, 17, and 2 values around the loop.
Select black 10 at the bottom entry and let it remove the dark outline and facial pixels while the white passes continue.
Select orange 30 and the later orange entries, including the visible 36/20 lower-rail phase, to clear the broad orange face.
Release the white 1 from buffer slot 1 for the remaining white pixels, then continue the black and orange passes without filling the other slots prematurely.
Finish the orange 9 and black 3 late fragment until the board is empty and the video shows SUPERB!, followed by EXTRA SLOT Unlocked!.

Colors in this level:

Black, White, Orange

Starting with orange because it is the largest visible region and leaving the white ears and cheeks inaccessible.
Discarding or replacing the white 1 in buffer slot 1 instead of reusing it for the late white pixels.

Start with the white Jellies so the ears and cheek/muzzle patches are exposed and cleared.
Keep the white 1 in buffer slot 1 available for the late white pixels.
After the white layer is thin, use black for the outline/details and orange for the broad face and final fragments.

Board notes 5 details

Layout: An orange fox head fills the center, with a black outline and white inner ears and cheek/muzzle patches. The lower-left rail gate loops around five empty orange buffer slots; the observed entry counter starts at 5/5. The opening queue shows black 10, white 40, and orange 30.
Goal: Remove the exposed white ear and cheek pixels first, then the black outline/details and the broad orange face, leaving no orange or black fragment behind.
Opening: Select white 40 and the following white queue Jelly; the rail visibly shows white 28 and 30, then white 23, 17, and 2 while the white fox regions shrink. Bring black 10 and orange 30/20 onto the rail after the white opening.
Danger Zone: A white Jelly with 1 remaining is visibly parked in buffer slot 1 late in the run. Reuse it when white pixels reappear instead of replacing it with another queue entry.
Mechanics: Fixed-loop rail movement, color-matched hits on the fox layers, five orange buffer slots, observed 5/5-to-0/5 entry-counter states, and remaining-hit reuse before the orange/black cleanup.

What is the Level 12 picture?
It is an orange fox head with a black outline and white inner ears and cheek/muzzle patches.
Which Jelly colors and counts define the opening?
The visible opening queue shows black 10, white 40, and orange 30; the first white passes visibly show 28, 30, 23, 17, and 2 remaining hits.
What reward follows completion?
The board empties and the video shows SUPERB!, followed by an EXTRA SLOT Unlocked! overlay.