For the 2020 House of Pixels challenge run by @_t3nshi. Participants were to draw a room of any theme, which would then be linked together by hallways in a small GameMaker 2 Studio game. The only limitations were to accommodate a 24x48 px character and to keep the colour count under 48.
I don't know much about game design, so it was a fun challenge trying to feed a story to the player as they walked through the room, keeping in mind that they could enter from either door.
Incomplete tileset
