This game asks you to do one thing: hit the keys corrensponding to the balls. This is similar to what rhythm games ask you to do, but the diference is that rhythm games (usually) give you arrows, so there is a connection between the object on screen and your action. This game has no connection between action and effect. Aso, why does the score go up in increments of 1250?
The game design decisions on this game look either random or lazy.