Something is weird here… neither of the scripts you show in your screenshot are in the zipfile I just downloaded.
Did you type them in from the video? If so, make sure the spelling and upper/lowercase of the filenames precisely matches the name of the class. Most likely it should be PlayetPlatformController
Otherwise perhaps post the scripts here using the code tags button above to get the formatting right. Here is how:
How to use code tags: Using code tags properly