Zool is a British computer game originally produced for the Amiga by Gremlin Graphics as a rival to Sega's Sonic the Hedgehog. It was heavily hyped upon its initial release in 1992, including being bundled with the newly launched Amiga 1200, although not the AGA version with enhanced graphics which followed.

The sequel, entitled Zool 2, was very similar in gameplay-wise, but with more cartoonish and detailed graphics and an attempt at a plot. It again received generally high review scores, but did not make an impact the way its predecessor had despite arguably being the better game as the difficulty level had been curbed and the controls were more responsive. A possible reason for the game's relative lack of attention was that, by this stage, the system that Zool was most associated with, the Amiga, was in decline as a gaming format.
(Wikipedia)

CHEATS

Zool

Type goldfish and press Enter to enable cheat mode. Press one of the following keys to activate the corresponding cheat function.

Keys

Temporary invincibility - 1
Level skip - 2
World skip - 3

Alternate cheat mode

Type stretlamp or streetlamp at the options screen. Press one of the following keys to activate the corresponding cheat function.

Keys

Level skip - Keypad Plus
Previous level - Keypad Minus
Invincibility - 1
Lose a life - 2
World Skip - 3
Restart level - 4

Zool 2

Press Esc at the options screen to display the configuration menu. Type phonebook and press Esc to enable cheat mode. Press one of the following keys to activate the corresponding cheat function.

Keys

Level skip - 0
Bonus stage - 3
More points - 4
Jump higher - Ctrl

Cheat mode (alternate)
Enter one of the following codes to activate the corresponding cheat function.

Codes

Invincibility - tough guy
Unlimited bombs - kickass
Press Enter to skip level - bumblebee
20 credits - vision


Here is the opening video ans some gameplay from Zool: