Arrow or wad keys to move. This is a platformer engine in order to adapt it to your own use you can add new costumes in all the sprites depicting where you want that type of thing (Except the Player and portal sprites) to make a new level. This platformer engine has trampolines, water, water current, lava, and walls. You can also replace the sprite with your own sprite.
I call this a tutorial because I have tried to have the project well noted so that anyone who wants to learn how this projects work can find out by reading the notes. NOTE: If you have questions about the code (or anything else) ask in the comments.