Use the left [<] arrow key to move left. Use the right [>] arrow key to move right. Use the up [^] arrow key to jump. Use the down arrow key [V] to go down. Don't touch light red. You can walk, jump, fall, and climb on green. Cheating is allowed.
Thanks to pkmnbro098 for the gravity script and the original idea from Platformer Playground 1, 2 and (yet to be completed) 3 If there is something wrong, please notify me via comments.