The original release had a different menuscreen which displayed two control options - a keyboard and a joystick. Also the ingame sound effects are completely different. Both menu screen and game over tunes were only present in the later release.
Releases
First 16-bit releases reviewed in UK Atari or multiformat magazines for Atari ST (1/1990), Amiga (2/1990)
Based on the review data, the Atari ST version was released first on the 16-bit market in Europe, and ported later for other 16-bit systems. Source: Research of over 16700 software reviews from UK computer magazines between 1985 and 1996.