The player is given a map of circles with a variety of difficulty levels, in which they must click the mouse button to hit the circles as they come down the screen.

Osu! download PC game is played with a traditional computer mouse, and the player clicks the mouse button to hit on the on-screen objects. Install Osu! unblocked is played with a traditional computer mouse, and the player clicks the mouse button to hit on the on-screen objects. Osu! is a free online rhythm game developed in 2006 by Dean Herbert, under the pseudonym of 'Peppy.' The game is a variant of the Japanese rhythm game Osu! play Tatakae! Ouendan.