A pretty good automation game, and quite impressive for a 4 day jam.
I got up to the second last upgrade I think (where I was making memory), and then things got so full that I couldn't really fit in the things I needed again. I think this is where the lack of quality of life features like the tunnels/bridges for belts, become very apparent. Another example is not having corners for belts (or dedicated entry and exit points on machines), which could have avoided belts accidentally become an exit point for machines they were on top of. The lack of space was also a bit difficult to deal with (in a way that feels beyond the goals of an automation game). I could have made another room, but there wasn't room for it in the room above, etc.
Speaking of, I really liked the scaling mechanic, with the rooms being small parts of the rooms above them. It feels like a really good build on top of an automation game.
I did accidentally delete one of the exit ports on one of the levels, which turned into a bit of a problem later (and is presumably not supposed to be able to happen). Other than that, that was fun!