The World's Hardest Game 3 Level 5 Walkthrough

DISCLAIMER:
This is neither a zero-death run, nor a speedrun of the game. I cut out the deaths just to show how to do each individual task. The progression of the death count throughout the walkthrough is meant to gauge how hard various parts of the game are, but results can and do vary significantly.

Now that we got that out of the way,
this video demonstrates how to complete Level 5 of The World's Hardest Game 3 and includes all the keys and all the paints.

Timeline:
0:03 Level 5 Begin
1:53 B4 and C4 First Pass
3:06 D4
4:11 C3 First Pass
4:43 C4 and B4 Second Pass
4:57 B3 (getting all the collectibles)
8:02 C3 Second Pass
8:55 C2 First Pass
9:49 C1
12:02 D1 (includes key for rainbow paint)
15:00 B2 and B1 (rainbow paint rooms)
17:46 D2 and D3
20:35 C2, C3, C4, B4, B3 Last Pass
21:45 A3 and A2
24:02 A1 (the ending)

Footage is taken from this old stream of mine:
https://www.youtube.com/watch?v=8vy5p56A_Pg&t=2820s

Видео The World's Hardest Game 3 Level 5 Walkthrough канала Jacob Moesner