The programmer of this should have been shot at birth! The colour scheme is horrendous, but the real problem is that the scrolling rarely keeps up with your movements... When you advance it often takes a few seconds for the screen to catch up!
One type of game the Spectrum's never been short of is racers... and all of them a lot better than Cisco Heat! There's some sort of game in there, but simplistic graphics and terrible colour clash hide it.