The following text can be found in the rom... evidently the remains of a debug menu. Would it be nifty or what if it were still there?

Debug: Show thud balls on path 
Debug: Turn off both backgrounds 
Debug: Show background 1 only 
Debug: Show background 2 only 
Debug: Show both backgrounds 
Debug: Create a monster 
Debug: Select map 
Debug: Mode 7 Flight 
Debug: Heel 
Magic: Thud Ball Missile 
Magic: Orb2Missile 
Magic: Orb3Missile 
Magic: Shak'em to DEATH! 
Magic: Beam me up Scotty 
Magic: Thud Vortex 
Magic: High Voltage