We know that any coin-op's graphics and sound suffer a little in the transition to the home micro... but this is ridiculous! Jackal on the Spectrum is in a sorry old state. And the Amstrad version isn't much better.
Gunship is a realistic and complex simulator... It needs split-second responses from the player, just like flying a real combat helicopter while trying to engage an enemy. This version, with its fuzzy graphics and trick controls, just isn't up to it.