The source is open to all on my git https://github.com/EngineerSmith/love-jam-2022
I wouldn't call it clean code, but it got the job done for the jam with only 7 days to work with. I do agree with being able to drag out walls, I just didn't have much time to polish it up on those little UX features (I would of liked to have added a little semi-transparent grid so it would of been easier to place too due to the terrain height)