The game broke the fun by making its extra content super hard to reach.
Game design: The game's graphic is pretty amazing.
There are various tracks and environments which keep the game lively. Tracks are split by different difficulties, there is easy, medium and hard, each with around 4 tracks to complete in given conditions. For each difficulty you complete you can unlock more boats.
There is also multi-player mode where you can compete with up to 4 players.
Game play: You will drive boats at high speed and during the race you can obtain boost capsules that will allow you to boost, you can also jump your boat, otherwise a pretty simple game.
Sound: There is nothing special about the music.
There is some voice over added but only to announce the game title, tracks and boats. Sound affects are also pretty dull.
The game can be fun at first but once you get to harder bits (which come really early) you will get frustrated and stop playing.
Easy mode is already pretty challenging, since you will always start last and will have to catch up with 20 boats (which is a bit of a pain) by going to medium you will already hardly ever become first place and I don't want to mention hard mode, the sad thing is most of the good content will come from medium and hard mode.
Overall if you are a boat fan you should check this game out but be warned, it gets hard pretty quick.