The engine is fun, but no updates for 6 months, even on the "bleeding edge" github. Can't get on the Discord, has there been any recent updates that it's still being worked on?
A free tool for creating oldschool FPS games · By
I tested it, the project actually crashes once it exceeds 200Mb. Previous projects uploaded here are the maximum size. Just add extra decoration and it won't load anymore. It's not the file type. In another project the same one works. It's really limited by the size of the project, not the amount of any files.
https://doommode.itch.io/doom1
The first 4 levels. They work especially well.