Platformer games

my friend made this awesome platformer game. I helped a little with some small ideas but it is his effort and all credit goes to him. He goes by the nickname Somebody. i want to inspire others with his game and he gave me permission to show it off so here it is:
Super slime parkour v6:

any questions ask me, i know all the parts of the game because i am his main tester and i have assisted some