played it on stream with crafty:

We played on stream! https://www.twitch.tv/videos/1569561768?t=0h3m10s

I don't understand exactly how this ties into the theme, I think killing guys in the form of rectangles no make you has remorse, more after, after of see theys deads you kill peoples, for this, "irgnorance is bliss", i like it.

Im not sure how it fits into the theme.
The wall jumping was quite good. It took a couple tries to get a hang of it but then it was fine thanks to the grippy surface.
Graphics are very minimalistic. Could have a bit more detail. And sound effects would have been good.
I am pretty sure I collected all of them but there was no way to finish the level

Edit:
After looking again, I realised I missed one and the part where the colour appears. I was not expecting that twist lol! I get the theme now. You were not aware of what war crimes you were comitting. Wow!

Interesting plot twist! Though movement was very hard to get used to, walljumping seemed to require frame-perfect inputs and still felt inconsistent. The artistic choice for the first half being blank boxes I think worked super well!

Wall climbing was insanely challenging, but the idea of the game is cool, and the effects system is unique. Sound effects and movement added to the panache.