osu!’s gameplay is based on a variety of popular commercial rhythm games. While keeping some authentic elements, osu! adds huge customisation via skins/beatmaps/storyboarding, online rankings, multiplayer and boasts a community with over 500,000 active users! Play the way you want to play, with your own music, and share your creations with others.
The player chooses a song and difficulty and as the song plays the player has to click on different Beats hit-elements (hit circles, sliders, and spinners) in time with the rhythm of the song in order to earn points
There are five default difficulties which are defined through the game as Easy, Normal, Hard, Insane, and Expert (commonly known as Another or Extra). Beyond this, “Marathon” difficulty is reserved for beatmaps which are longer than 5 minutes.There are also difficults that the creator of the beatmap can use ( mostly his username )
The elements of osu! are hit circles, sliders, and spinners.
Hit circles are a common object on nearly every beatmap. When a hit circle appears, a ring, called the approach circle, will appear around it and begin to shrink. In order to score points from a hit circle, players must place their cursor over the circle and click the hit button as the approach circle touches the edge of the hit circle.
Sliders appear as two hit circles with a solid path, called a slider track, between them. As with hit circles, an approach circle appears at the beginning of a slider track, which must be clicked when the approach circle touches its edge. Unlike hit circles, however, after the start of a slider has been hit, a ball, called the slider ball, will begin to roll along the slider track, and players must continue to hold down the hit button and keep their cursor hovered over or near the slider ball until it has reached the end of the slider. Sometimes a slider end will have an arrow, called the reverse arrow, which means the player will be required to follow the slider ball back to its starting point.
A spinner is a large circle that takes up most of the play field when it appears. A ring like the approach circle of hit circles and sliders will also appear and begin to close on the spinner’s center. Players must hold down the hit button and spin their cursor around the center of the spinner. As players continue to spin, the spinner gauge at either side of the screen begins to fill, and once it has been filled, the player will be notified that the spinner has been cleared. Continued spins after this and until the ring reaches the spinner’s center will award bonus points.