Instructions (Part I): Open your MakeyMakey kit and and carefully lay out all of the materials. See the below image.
Instructions (Part II): Carefully view the below introduction video to obtain a general idea of what the MakeyMakey is capable of.
Instructions (Part III): Carefully study the below video to learn how to set up and begin using your MakeyMakey.
Instructions (Part IV): Using the information in the above video, and the materials provided, build and test a controller for your Scratch game using your MakeyMakey.