oh my god why has nobody made this before
now everything else in blockland should have key colorable versions
key colorable tree (for gnomes and squirrels to secure their homes)
door with only a handle and keyhole colorable
trapdoors with colorable keyholes (also a trapdoor in general pls im tired of building them)
keyhole brick
keyhole 1x2 inverted ramps (for secure ducks)
etc