Car Sort: Color Puzzle Level 155 Solution Walkthrough
Board Analysis
Opening, mid-game, and finishing states sampled from the video.

Bowl-Shaped Board
Level 155 gives you a large open bowl, but that space disappears quickly if the bottom columns enter too soon. The top stacks hold green, purple, yellow, and orange. The bottom holds cyan, green, white, and orange.
Use the top to create working space. Clear green from the top, then purple from the opposite top stack. Follow with the yellow/orange top cars. At this point the bowl has enough room to accept cars from below without blocking itself.
Move cyan from the bottom columns next, then green lower columns. The final cleanup is white and orange from the bottom.
Recommended route:
green top -> purple top -> yellow/orange top -> cyan bottom -> green lower columns -> white/orange bottom
The bowl should remain mostly empty between batches. If it fills with two colors, stop opening new columns and finish the color already moving.