Play mode: W or up arrow to jump TIP: hold the jump key down arrow or S to duck (excluding mini mario) A or D, left arrow or right arrow to move around 0 key to enter / exit editor Editor Mode: 1 key for wood blocks 2 key for special blocks 3 key for blue / orange semi blocks 4 key for coins and mario 5 key for slopes 9 key for enemies, and powerups l key to enter a level r key to reset level (BE CAREFUL TO BE SURE.)
credit to @griffpatch (@griffpatch_tutor only for tutorials) spriters-resources for 1-UP mushroom