Okey, I'm amazed. First of all the game is incredibly polished. All the art is really good, it has A LOT of mechanics and potential. It lacks a tutorial, so it's hard to get where you can place tiles and where you can walk. I didn't get what the locks do either. But I think it's fine. I see how it can be expanded into a full game. Well done!
Edit: and the sfx are really damn good!