These are the sprite-sheets I doodled for use in https://clyde.itch.io/sprite-walls
You can do anything you want to with them. No attribution is necessary, but it's fine if that's what you want to do. Really, I just thought it might be fun to have these sheets so you can see what the environments are made out of and identify the parts inside the whole.

I plan to doodle more sheets and make more rooms and update the game. So hopefully it will change. You may not be able to access an old room and if you tell someone that there is or is not something in the game (though you may have been corrrrect at one point) they may prove you wrong.