The boat would be more fun, if it didn't go left or right on its own accord. This may be realistic, but the game prides itself on being an unrealistic arcade game.
It's strongest part is the music with the original SpyHunter theme. Written by Mancini, it is by far the best part of the game.
The game isn't all that bad and sometimes is even fun, but serious bugs make even the 80's arcade game better. So, in a nutshell, if you're prepared to play a run-and-gun driving game with so-so graphics and many nasty little problems, this game is for you. And if you're not, I suggest you get the PS2 version instead (being a PC fan myself).