This game is coming along nicely. Some simple requests, add an "undo/redo" feature when adding parts to the bench (I noticed in your latest video you tossed everything and started over, but you could have easily cleaned up those excess parts without destroying your existing layout.
Have a can of "paint" or "spray paint" available for people who want to make their walls a little more colorful or just leave something behind. Perhaps even allow for seasonal decoration, like tracks around trees, etc.
Can't wait for this to come out on Steam, beautiful work so far!