Nice, i made the whole concept of game, but didnt really made that progress
I have problem with procrastinating
I thought about black and white too, it would be pretty easy to implement
But i want to make something more original
Thats why im stuck at pixel art
I abandoned this idea
Im gonna make something similar to Bounce Tails (game for old Nokias from 2009) and Home Sheep Home also old flash game
But i suck at graphics
Aw man, i had the similar idea with colors, but i thought about some platformer not a puzzle, where platforms and other things you jump on, will disapear or just not collide with you.
I see i am not that original
Good luck with your game!