Like the arcade version, the Speccy Nemesis is very fast and very hard. The ship is highly manoeuvrable and the aliens whiffle about like nobody's business, knocking you out before you really notice. In fact, the collision detection is the game's single major flaw. To avoid the usual problem, Konami has you destroyed about half a sprite before you thought you'd hit anything - a bit irritating to start with, but you get used to it.
Otherwise it's a faithful, no-frills conversion. The graphics have suffered by necessity, but if you can accept that you have a Speccy in your living room, not a four-ton three megabyte arcade machine and a lifetime supply of 10p pieces, Nemesis is well up to expectations. A deserved hit for Konami!