This template for a Rust project brings async/.await syntax into your Miniquad project without bringing in a runtime! (Your async code is blocking, however!)
This allows you to synchronously preload items (such as loading assets) while inside the Miniquad execution thread, or simply to execute any code once before the main draw loop.
I have provided an async fn load_file("path/to/file") which wraps Miniquad's callback based function into a Future to avoid Callback Hell
Any drawing should take place in fn run() with Context living as a global static mut. Dangerous, yes, but necessary.
Most of the relevant parts of the work all come straight out of Macroquad, which itself is an abstraction over Miniquad solving the exact same problem + more. If you are looking for a more feature rich abstraction, use Macroquad.