Update README.md

Author: m039

README.md

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 # Simple2DParallax
 A basic parallax effect for Unity 2D.
+## Information
+This library only supportst horizontal parallax in a very basic form. You can look at how it works in the [Example](Assets/Scripts/Example) section.
+## Credits
+* The [art](https://aethrall.itch.io/demon-woods-parallax-background) by [Aethrall](https://twitter.com/Aethrall)