Is there a roadmap of the engine's development?
Or are the features added as they are needed for World of Esenthel?

Yes, for World of Esenthel. Now I'm improving some engine custom physics related collision detection. As in my game I'm not using physx or bullet but everything I handle manually.
In some time in the future maybe I'll play around with physic cloth bone simulation, but don't know when.
I also have idea to add option allowing load objects without their meshes/material/textures to reduce memory usage, when they're not needed.
I'd also like to add Vulkan at some point.

I see, thanks for the reply. Are there any plans to make the engine at least source-available (not fully open-source)? I'd like to contribute, but I don't have a way to donate every month. Also, it would make the engine more appealing to other people.