Super sequel
The biggest change to the game is the interactive levels. You can place bombs on tracks and have everything on the track get hit. There are also tiles that can reappear. It is not too different from the first one but it is new enough to mean something.
The multiplayer is still loads of fun. The interactive environments help with that, but the game is improved with CPU multiplayer options. You still have all of the great powerups, including expanded explosions, kicking, grabbing, and increased bomb dropping.
It is an excellent sequel!