The art posted here comes from Shen YH, who has created a watercolor-like art imagining Made in Abyss as a video game. I’m not sure what the purpose is behind this, but if it’s concept art for an actual game, that would be awesome.
These images apparently imagine Reg, the robot boy, as the player character, and depict him in some of the most iconic scenes from the TV series, now with health bars and maps and such.