Start the game and save it immediately. Exit and edit the file
called HOCUS.SAV Changing the byte at hex position 30 will set the
level you wish to play. The value 0 is for level 1 - 1 for level 2
etc. Reload the game. Restore the save and hey presto. If a level
skip's not enough for you and it's infinite energy you're after then
edit the file HOCUS.EXE and change hex offset 10884 to 90 90.