This game was made by a Japanese systems architecture company. It was their first and last game. The precise reasons why are obvious: the controls were devised by a person who had no idea how one would expect a futuristic hovercraft to control, even on the original stickless PS1 controller, and all of the graphics, they say, came directly from the PlayStation SDK. I have heard this before from several reviews of this game, but I don't know if I believe that ALL of them were. I am fairly certain the character designs, for instance, came from the lower echelons of DeviantArt, which is impressive seeing as this game released 5 years before that website came online.
Diversification is a bitch.