Not to bad all things considered. Especially when you look at the Speccy version:
http://www.youtube.com/watch?v=u54QeWN8vLM
Picked a copy on budget up for a quid second hand in about 1991 so was quite pleased to finally have a CPC copy. Although nothing matches the experience of playing it on my mates Atari 800XL. And the 7800 version (not shown) is even better.