Amazing track ! That sound design is gorgeous. I especially like those screaming sirens sound, and the mixing really makes it feel immersive.
If I had to nitpick, I'd say that it feels more drowned that cold, though it makes sense considering the painting. I also thinks it could have a bit more progression, like a bass coming or a chord progression sticking out after all that time drowning in the reverb-ed pedal point.
I'd love to hear more of you !