You can press the blocks one at a time and not release animals in the cage area after passing through the castle . However, you will not receive any points from them.
Cheat Codes
To activate a cheat, press [Shift] + [?] and enter its corresponding code.
Cheat
Code
All keys
KEYS
Ammunition
AMMO
Clear surrounded by 4 squares
ZAP
Debug mode (OFF)
+DEBUG
Debug mode (ON)
-DEBUG
Full health
HEALTH
Gems
GEMS
Illuminate room
-DARK
Obfuscate room
DARK
Torch
TORCHES
Faster game play
Intentionally die, then enable the health code. The game over message will disappear, and you can continue the game at a much faster speed.
Invisible demon
You must defeat the invisible demon in the Caves of ZZT, when going to get the key in Hell. The demon will only stay on the sides of the room.
Restart after you have lost
If you get killed by anything that will not indefinitely reproduce, after everything speeds up, wait until every creature gets to you, then enable the health code. This will give you 50 health points. Save the game, quit, then reload your game.