Thank you so much @EightySix! The technique is called PETSCI art, and you use 8x8 tiles with one foreground and one background colour. It really adds to the challenge of making coherent pixel art.
Im not sure is it experiment, but I haven't seen nothing like that before. Looks really interesting, good job!
nooooiice. great composition and colors and style. gr8 work boi!
I love all of these