Hi! I designed a Lego model of a Runner in mecabricks: https://www.mecabricks.com/en/models/PkaJ081GjxM
Here are some screenshots of the model and sprite:
Front
Back
3/4 view
The only thing I don't like is that the legs won't be able to turn like they do when running...
I really hope that I will be able to build it in reality in the future :)