Holy cow! it looks like the game I'm trying to make based on the old DOS game, Sleuth! (I think the dev log is at zed-hanok.itch.io/sleuth-remix -- you should check it out for a laugh at the similarity!)
My whole family likes your tiles, by the way. I think I'll fiddle with the colors and see if I can make use of them in my game!
Great minds think alike, huh? :)