WASD or ARROW KEYS = Move 0 = Level Editor (Press 0 when done to save) Hold space to layer the tiles R = Reset Level (If in the editor) L = Switch Level (If in the editor) 123459 = Toggle Option (If in editor) X = To shoot fireballs (If you are in fire Mario) Jump to collect stuff that is from the mystery block
Credit to @griffpatch for the tutorial