Professional gamers like Ninja use this music game to practice their aim and improve their mouse skills — Here's how you can play for free

6:22am PDT - August 24th, 2019    nintendo direct - Business Insider

"Osu!" is a free music game that lets you use a mouse, tablet or touch screen to follow along with different songs. Professional gamers use "Osu!" to practice aiming and improve their mouse skills. "Osu!" has tons of customization options— you can design your…