The Amiga version features multi-layered copy protection. The main part was cracked quickly, and produced what appeared to be a playable game. However, a second layer remained, which raised the difficulty level quickly, to the point where the first boss was impossible to beat. Unfortunately for the Bitmap Brothers, this hard work seemed to backfire, as many assumed that the cracked version they played was representative of the game's difficulty, and the game's reputation was hampered as a result.
The box cover art for the Amiga, Atari, DOS and Genesis (PAL) release was done by famous comic artist Simon Bisley (Sláine, Lobo, Batman/Judge Dredd, and several other works).