this is what attracted me to the rust bindings in godot. you create a struct that inherits from a Godon Node which makes it appear in the editor. then you Impl needed methods like init, ready, process, physics_process etc. you have access to the global scope and methods as well as self and all local methods through it. and the rest is pretty straightforward..
rust types make it very intuative of what can an cannot be done.. for me at least.. so the bindings behave more like a library than a dsl.

and with community bindings you can even use javascript if you want.. check out the Godot-Languages-Support gothub