I found this in my trash folder and thought it was just barely interesting enough to keep from being lost to time. It's an early build of 2.5D Level Maker from right around the start of development in August 2019. Behold the glorious placeholder graphics. At the time, it was called "3D Level Maker"... Bit of a misnomer. (The completed project is here if you haven't seen it: https://scratch.mit.edu/projects/325052746/)