Creating a 2D sidescroller, anyone know any sprite sheet tutorials?

Hello! I’m am currently creating a 2D sidescroller game inside of Unity, and building everything (backgrounds, sprite sheets) inside of Photoshop.

Is there any tutorials or reference I could use for the coding, do I can get the sprite sheets to work? Or if you could refer me to another question that has been answered, that would be great. :]

http://ragepixel.com/ it is a free resource that u can use to import png sprites of your own or create pixel art sprite sheets for unity. I highly recommend this!