Why does everyone hate this game? No effing clue.
The graphics are like a mix between Yoshi's Island and Mario Kart, and has
many catchy tunes, but the best part of the game is it's gameplay. Every level has exclusive mechanics and enemies only found in the level. The game may be short, but you must play through it 3 or 5 times to beat all of the levels.
My guess people think the game is bad is because they think it is too childish. Well, screw them people they just haven't played enough! You need to play the game long enough to understand how much fun the game can get.
I do recommend this epic game, but be warned; if you are vulnerable to "cute" graphics and "cute" tunes, be ready to send this game back to the depths of GameStop. However, if you appreciate Yoshi games and like to play games longer before you decide if it's good or not, be ready to play a very good Nintendo 64 game!