Why should I open the black middle band first in Bus Rush Fever! Level 90?

Until that strip breaks, the tilted square keeps behaving like one rigid panel and the outer colors cannot sequence cleanly. Splitting the dark core is what lets the angled rows separate.

What usually clogs the black middle band in Bus Rush Fever! Level 90?

Polishing the perimeter while the black brace holds. The board looks busier, but the rotated wall is intact and every route still slams into it.

Bus Rush Fever! level guide

Bus Rush Fever! Level 90 Walkthrough

hard 5 colors

Bus Rush Fever! Level 90 is solved by exposing and splitting the black middle band first, then letting the tilted square collapse through that diagonal lane. The outer colors only matter after the dark core stops behaving like a brace.

Board Notes

Layout: Level 90 opens as a tilted square packed with black pieces through the middle. Green, purple, yellow, and red buses form diagonal bands around that dark center, so the lower field looks like a rotated wall instead of a flat one. The board is dense but still directional.
Goal: The first target is the black middle band and the diagonal lane running through it. Until that strip breaks, the tilted square keeps acting like one rigid panel and the outer colors cannot sequence cleanly.
Opening: The walkthrough uses the easiest diagonal-facing clears to expose the black band, then splits that dark center before flattening the rest of the square. It keeps the outer corners from stealing attention while the main brace is still intact.
Danger Zone: The danger is spending too many edge clears while the black center is still whole. That produces surface progress, but the next route still hits the same tilted wall.
Mechanics: Level 90 is a diagonal wall board with a dark core. The solve is about cutting one central brace so the angled rows stop reinforcing each other.

Quick Tips for Bus Rush Fever! Level 90 (spoiler-free)

In Level 90, the black band is the truth. If it still holds, the pretty outer colors have not changed the board.
With 5 colors in play, clear the pair with the fewest blockers first so the board opens up instead of tightening.
Think in chain clears. The best move is the one that sets up the next two moves, not just the quickest current match.

How to Solve Bus Rush Fever! Level 90 — Full Solution

Expose the black middle band before you spend moves on the safer edge pieces.
Split the dark diagonal core so the rotated square stops acting like one wall.
Keep the outer corners tied to deepening the same breach instead of polishing the perimeter.
Bring the upper route into the center only after the black brace has clearly failed.
Finish by clearing the leftover diagonal rows through the lane that already broke the square.

Colors in this level:

Black, Green, Purple, Red, Yellow

Common Mistakes to Avoid

Spending too many edge clears while the black center is still whole, so you make surface progress but the next route hits the same tilted wall.

Frequently Asked Questions

Why should I open the black middle band first in Bus Rush Fever! Level 90?
Until that strip breaks, the tilted square keeps behaving like one rigid panel and the outer colors cannot sequence cleanly. Splitting the dark core is what lets the angled rows separate.
What usually clogs the black middle band in Bus Rush Fever! Level 90?
Polishing the perimeter while the black brace holds. The board looks busier, but the rotated wall is intact and every route still slams into it.