1) In Classic you must only avoid colored enemies and every two seconds you get score.
2) In Lives mode you must avoid black square enemies and collect red squares that give you +1 live and also every two seconds you get score.
3) In Points mode you must avoid black square enemies and collect blue squares that give you score. Dark blue square gives more score than light blue square.
Its sounds simple but its fun. ;)
I programmed this game when i was 10 in Java. Its my first game that I develop in my life. Now its on mobile.