Use arrow keys to move. 0 key to open editor. In editor, 1 to 3 keys to change layer, and press the same key again to see the onion skins; p key to show/hide collision pins. If collision pins are opened, 1 key to let a pin be solid, x key to make it non-solid. Tip: let yourself guide by the dirt on the ground. P.S: go up !
All credits to @griffpatch, he's really incredible!!! : ) REMEMBER TO LOOK AT 7:00 OF THE VIDEO !!!!!!! https://www.youtube.com/watch?v=xDp3AypuZtg&t=121s