Sorry for the double post Sam (the coder) and me (Leendert) are both on the same account.
Since its pixelart adjusting the colours isnt really hard to do. We will look into this in a later stage when we have the complete game working.
Thank you for all the concerns. Dont forget high quality artists who are on mentioned website (aswell as Pixeljoint) have worked for this project.
Actually I'd love to see a post over at Pixelation! This is some kickass pixel art.
You really need to sort out the cluttering early though, because it's so important due to the perspective and gameplay. It should not be underestimated.
I think it's fine to have lots of details on the walls and such, but the ground should be quite plain to add the necessary contrast between walls/mechs/ground.
Also, the warning stripes, why not have them near the edges of platforms and near walls? Would be a good way to signal the height difference. Also shadows are usually a pain technically, but they would really bring out the perspective.
You could even look into blurring based on what level you're on, even though most pixel artists cringe at the idea of a shader messing with their precious work.
I did a quick edit testing some stuff, looks kinda bad but the mech stands out more.