Level codes:

 ROSS
 RATT
 LISA
 SINK
 DAVE
 BIKE
 IRON
 BIRD
 LEAD
 TAPE
 WEED
 VASE
 RING
 PILL
 GIRL
 SPOT
 GOLD
 PALM
 OPAL
 LOCK
 SONG
 SAFE
 FIRE
 WORM
 LAMP
 TREE
 SINK

 For particular effects try:

 NOSE
 EYES
 HAIR
 SIGN
 MYTH