The initial sequence is incredibly long and having to replay it every time you lose the game is quite painful.
The game itself is simple, also quite weird, which makes it more interesting, though. It's a pity the only available language is Portuguese; you're missing out on a larger audience if English was an option.
When collecting musical notes, there's also no need to show +1 popup, since the score counter is right up there and everything in the game only gives you 1 point.