Basically use the arrow and WASD keys to move. Also, use the space key to jump and the E key to talk and attack.
Update 1.35: Added wizard NPC and its dialogue Update 1.36: Added hearts and damage Update. 1.365: Added lava pool to damage player Update 1.367: Added boss and attack mechanism Update 1.3675: Added boss direction Well from @nn0694 Music from @Scratchteam Boss direction script from @10data10