You need to see part 1 first- https://scratch.mit.edu/projects/431978466/ Check out my 3D tutorial! Arrow keys or A and D to change slides. Fullscreen is reccomended. This tutorial is hard to remember, so I suggest that you open 2 tabs. One with the project editor, and one this project.
Music by bensound.com. All coding, screenshots, and coding in screenshots is by me. This teaches you how to finish your platformer!