Documentation needs to be updated to show that methods that type a type-name string can also take the type constructor itself, directly.

Document should be short and contain basic information about pixiq package primitives (Image, Selection, Color, Screen, Loop) and coordinate system used by Pixiq (origin is on top-left corner, x is always before y in method signatures etc.). It should be approachable by beginner. Experiment with visual documentation - maybe create Pixel Art animated image describing basic primitives?