Does Level 574 have a locked fifth slot?

No. Five ordinary slots are available throughout the verified video.

What remains in the Level 574 tail?

The late active cards include cyan 1, cyan 3, and beige 1 before the blank picture frame.

Food Hunt: Pixel Puzzle level guide

hard 13 colors

Drain the skater scene with cyan 30, blue 40, cyan 50, and blue 30, then leave room for the cyan 3 and beige 1 tail.

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

Fresh-tap cyan 30, blue 40, cyan 50, and blue 30 into the first four available lanes; the opening active values are 26/36/47/29.
Wait through 20/36, 13/29/47/29, 7/23/41/23, and 1/19/35/19 before taking another large cyan or blue nest.
As the skates and cyan field recede, fresh-tap black 30/24, purple 24, red 10, gray 16, and white 20 only when a slot has left.
Around the cap and face, stagger pink, red, black, cyan, and beige remainders; leave a lane for red 5/2 and purple 3/1 details.
In the late white/cyan frame, let active values pass 20/12/24/21, then 10/2/14/11, and 5/2/7/1.
Admit the last small pair only when room exists; the tail shows cyan 1, cyan 3, and beige 1 before the picture frame is empty.

Colors in this level:

Cyan, Blue, Gray, White, Cream, Beige, Black, Purple, Red, Pink, Yellow, Orange, Brown

Treating the second cyan or blue nest as a continuation of the first active card.
Stacking another full cyan/blue group while the cap or face still has a small exposed detail.

Board notes 5 details

Layout: A cartoon skater with black hair, red/yellow cap, pink shirt, blue skates or board, cyan background, white accents, and a purple right-side stair block fills the picture; five slots are open.
Goal: Drain the cyan and blue background layers, then the skater's black, pink, red, white, beige, yellow, and purple details until the last small cards leave a blank frame.
Opening: Fresh-tap cyan 30, blue 40, cyan 50, and blue 30; active values visibly read 26/36/47/29, then 20/36, 13/29/47/29, 7/23/41/23, and 1/19/35/19.
Danger Zone: Two cyan and two blue families fill the tray early while black 24, purple 24, red 10, gray 16, and white 20 details expose underneath.
Mechanics: Five ordinary slots remain available throughout; repeated cyan and blue colors are separate fresh nests with independent active-tray remainders.

Does Level 574 have a locked fifth slot?
No. Five ordinary slots are available throughout the verified video.
What remains in the Level 574 tail?
The late active cards include cyan 1, cyan 3, and beige 1 before the blank picture frame.