O2Jam Interval

O2Jam (Korean: 오투잼) is a casual rhythm-matching online game developed in South Korea by O2Media. At present there are agencies in many countries and regions.

Horizontal bars slide down a series of seven columns, each corresponding to a key on the keyboard. Just before the notes hit the bottom of the column, the player has to hit the key corresponding to that column. Each keypress emits a note, vocal, or other instrument that creates a full-sounding song. A correct hit is also rewarded with a small 3D visual effect that is determined by the background on which the players are playing.