Play your favourite songs.
Who wouldn't want play his/her favourite songs in addictive way?
Though new guys and girls who are new to this kind a games probably at first, can't get into a highscore lists. But after spending some time with this you will find your name there. It is really rewarding feeling if you are highscore maniac;) Also if you play same songs with your friends, it takes lots of time to play same song again and again to beat your friend:)
For those who have short temperament, I would say not to play mono "character", it really get my nervers if I somehow accidentally take gray block in the end of the song^^;;
If you have tons of music in your computer, I advice you to try many different music genre songs. It is really fun to see and play different type tracks.
Concerning highscore list, I would like too that different "characters" would have their own highscore list, since I'm pretty sure you can't score same amount, or higher score with mono that you can score with eraser example.
Iron mode, ninja mono for the win 8)