This is an engine that allows me to build stuff in 2D easily and then dump it as json which can be used in my projects for handcrafted stuff. It'll definitely be in use anywhere where there's a story on a 2d fixed screens game, for example Alchemist.
A modified version would also be useful for the 2d building aspect of the hub game.
There are two layers -- one that sets the background generation and one that actually stores handcrafted data. Presumably the former would be procgen and use wilds. This can optionally also be outputted, but for something like alchemist it might make more sense for it to be built on top of the personal realm's generation.
That said, it makes sense to be able to create a background via alchemist's wilds generator (which should be a core file as I plan on improving it a bit).
So there will need to be controls for that.
Things like solid, water, floor should be indicated in there as well.
Testing
There should be a way of actually testing the generation, with solids doing what you'd expect.
Anything that has a. "obj" field should spit out it's data on a screen to the left, since the right would be used for actual building tools.