Alright since HoshikunV2 introduced you with a good rhythm game now I would like to share a popular game played by mostly Japanese media fans. The title explains the name and a catchy phrase but none of them gonna change your mind unless you try it yourself.
Lets check out the main page itself of what this game is all about;
osu! is primarily played using a mouse to click 'beats' displayed on-screen in time with the music. This is analogous to tapping the beats on the Nintendo DS screen with a stylus. At the top of the screen, a health bar is present, which is constantly drained. If the player hits or clears a beat, the health meter at the top of the screen fills slightly. If he misses a beat, a large part of the meter is drained, and if it gets completely empty, he fails the song. There are three types of beats in the game: Hit circles, sliders and spinners. Every time the player hits a hit circle or an end circle, touch a slider tick, or clear a spinner, the combo is raised by 1. If he misses any of the above, the combo is reset back to 0.
Basically, this rhythm game require you to click on their 'beats' using your mouse before the meter drained. The hardest part is to maintain the faster beats that constantly appeared plus the moment while you are sliding the spinners, a part that total beginners would gave up and throw up the game in the dustbin straight away. Put that aside, this game is totally enjoyable with the good interface and you may use them as your personal MP3 player if you are tired of playing.