Thank you that makes me happy :) i tried to sync the level transition glow and audio and im glad you noticed :D
I'm glad the color correction did something because i had nobody to test.
In essence its this shader https://godotshaders.com/shader/colorblind-shader-4-4-1/ with one additional option (Achromatopsia) that i tried to implement myself after reading up on the different types of vision.
So better trust your doctor xD