Oh, there we go, there was a third message
No, it's not the engine, while I still tinker with it to add new features or QoL options for scripting, it's largely a done deal and has been for a while.
It's the mechanics of the game and how they come together, meaning that it is very difficult to add content when that content becomes deprecated and has to be re-done as we continue to work out the systems driving the game. Essentially I'm not interested in adding content I'd need to delete later on anyway, I'll stick to working out the fundamentals first, then move on from there, when I feel it's ready.
Viewing post in Esoteric Update #291 - All Keys To All Doors comments
It's what kills a lot of projects like this, people rush into making content without having developed the fundamentals for that content to exist on and eventually just run into a wall where they cannot progress with the project due to such overwhelming tech debt in the early design that getting out of it is impossible.