WASD/arrow keys to move, collect the key(s) to open the door(s), and avoid spikes and acid. Get to the portal to advance to the next level. Collect special saup (saup not soup) to get a buff. Collect regular saup and mashrooms ( not mushrooms) just because collectibles are satisfying. To kill the final boss, simply wait until he's in his vulnerable stage, then jump on his head. Three time's the charm! Also, remember to be on the lookout for the mysterious purple mashrooms...