Zool 1

Zool 1

To complete this game with ease, type: "goldfish" and hit ENTER.
This activates a cheat mode, whereby if you press 1 you become
invincible for a short while. 2 will skip you to the end of the
level. 3 enables you to skip whole world.

Type "STRETLAMP" at the options screen.(I have a feeling that the
word should actually be "STREETLAMP"!)
Then the following keys give you:
KEYS EFFECT
~~~~ ~~~~~~
Grey + Level up
Grey - Level Down
1 Invulnerability
2 Lose a life (why?!?)
3 ??
4 Restart Level