There is a simple graphics library for micropython, look at the demo that comes with it.

I actually thought about writing an interface to use nGL from within Micropython, but in the end it'll be too slow.
I would have to implement a new data type (GLFix, fixed point) that is not supported by python directly, using floats wouldn't be fast enough.
It would definitely work, but it won't be fun.

Anyway, I designed nGL in a way that makes it fairly easy to use, without any complex language constructs.
Knowledge of C should be enough (although the files have to be C++) to get a decent nGL app running.
Also, to just do some basic 2D graphics I'd recommend looking at other libs which aren't optimized for "heavy" 3D graphics like SDL or n2Dlib.