When you come across the portal room for the second time, when you have to switch the time to the present for the first time, the Prince will say that something is wrong. You must run the switches on the wall to make the portal work correctly. Do not run the switches on the wall. Instead, enter the portal as it is and you will switch the time to the present. Save the game, then exit and load the game. You will now be playing as the maggot man. In this mode you will keep losing life and lose much more health when hit than in normal mode. However your attacks will be very powerful and you are much more quicker. Note: Save the game on a different file if you wish to continue the game as the Prince.