I started working on a raylib binding for pharo using pharo's ffi...I have to say pharo's ffi system is very easy to use. It works and I got a few demos working, but I haven't put in the function calls for most of raylib. https://github.com/Zenchess/pharoRaylib

There's also native pharo smalltalk stuff like athens, woden, and maybe others... Personally I have moved to using Dolphin Smalltalk and raylib bindings there as it's been more performant and I prefer Dolphin over pharo. Dolphin also has good external interfacing support and is more of a native Windows OS smalltalk distro. If you're looking for building native windows looking applications on windows at least probably your best bet is dolphin and it's free and open source.