Hey you get free bongos.
Okay, you have some modes like the main mode where you collect coins. Then you have one where the beats are invisible, which forces you to memorize. Then you have three minigames which are:
banana climbing
banana juggling
bash k rool (never played this one)
You also have a shop where you buy instruments, so instead of your bongo sounding like bongos, you could have it sound like a car. You can also buy harder versions of existing music.
There's only 30 or so pieces of music. They come from everywhere. You've got Pokemon, Turkish March, On the Road Again and some others. Go look somewhere for the list if you want.
Then there's multiplayer which is up to 4 people that can take different parts of a song.
The game is basically, a note comes, when it lines with the circle, you input. A yellow means left, a red means right, a blue means clap and a magenta means both left and right. You finish the song and you get coins based on points. Use coins to buy from the shop and repeat.
I find this game too simple and shallow for my tastes. I mean look how easy it is to make this game: no AI, no level design, no graphics and so on.