Getting something on screen should be easy.
Zinc makes this trivial:
new Shape();
Calling that will put a square in the center of your screen. You can also do more of course, like setting the position:
new Shape(){ X = 100, Y = 200 }
Zinc usually favors trim constrcutors with optional parameters, and exposes entity-relevant variables through properties. Which is to say that in Zinc, the object-initializer syntax is your friend. This dovetails a bit with Zinc's philosophy of locality, but the idea is to try to give you everything you need at the moment you need it.
Dovetailing with magic as well, we give you typesafe access to anything you put in the res folder. Want to see what files you've got in your code editor? Try Res.
and see what code autocomplete shows you.
Your whole game should feel addressable at any point of when you're writing code.