Also, after you complete the expert challenges, then there are the super-expert challenges (I can't recall what the game calls them). Many times, you have to get silver or even gold to unlock the next segment of the game.

Also, I'll bet the multiplayers levels are counted into that 300 number. As far as I can remember, there are about 60 regular, 10 regular expert, 10 regular super-expert, 3x10x4 = 120 story mode levels, 30 expert story, 30 super-expert story levels. That's about 260 right there.

Its one of my favorite games for Wii. It is one of the best uses of the Wiimote yet. However, as some have said, some levels are great and others are an exercise in frustration. I'm at about 90% completion and most of the levels I have left are just painfully hard. However, its still one of my favorite games and a great party game.