On the title screen (option screen), type any one of the following:
"EXISTENCE PRECEDES ESSENCE" -- Press 'N' to skip levels
"JDYBWXNC" ------------------------- Start at The Island
"PSYRHFBN" ---------------------- Start at Funghi Island
"NZDWOESD" ------------------------ Start at Dust Island
"LGUIRHSG" -------------------------- Start at Lavaville
NOTE: Type at a slow steady pace.