This game is severely underappreciated, or unappreciated at all really.
It's a bit hard, but the Stages flow very nicely in this game. You feel like you blazed through the Stage even though it might have taken you 5 minutes to finish. You will have many accidental deaths though, because you were going too fast or moving the wrong way or something along those lines.
Graphics: 8/10 The graphics aren't the best, but they are good for when the game came out, very early in the PS2's life, before the developers really knew how to use the PS2's graphics to the fullest.
Sound: 10/10
The Sound is great, I found no flaws with it. The music makes your adrenaline pump and you finish the Stages quickly because of it. The Sound Effects are great too, when you're on the beach stage, you hear seagulls and sometimes you hear the waves crashing.
Overall: 9.4/10
The game is great for when it came out, it's very underappreciated because people are judging it from the standards of the games that are coming out right now, and that's not fair. If you have a spare 20 bucks, go pick this game up, it's worth the money.