The project you linked to has been archived. Are you sure they are still maintaining it?
As someone who's playing with Lua to run an incredibly lightweight HTTP server[1] which requires just a few MB on disk and 1MB of RAM (while supporting stuff like JSON, HTTPS, Sqlite DB, Email, MQTT and a lot more), I would be curious what you think are the problems with Lua.
https://github.com/LuaDist/srlua
The Lua runtime is 340kB on Windows and there's plenty of project including the one above made by the Lua maintainers to produce statically linked and dynamically linked binaries.
But it's Lua, so while I loved the language, you have to put up with the tiny list of standard features which can make it a grind.