As usual, up arrow key to jump and right and left arrow keys to move along the x-axis. This project has three levels, but level three is NEARLY impossible, (even i hardly ever finish it, not saying i'm better at games then you, but it is my game . . .). By the way, you MUST collect all of the "collectables" (as griffpatch calls them) to complete a level. Be sure to like and favorite the project, and i wouldn't mind a follow ;)
I used @Griffpatch's youtube video on how to make a scrolling platformer (https://www.youtube.com/watch?v=sebnyhBsXug), and you should give his tutorials a try, cause they're AWESOME.