*Try playing it without sound

Here's a link to Patapon, a rhythm-based game. Try playing it with and without sound and will realize the difference. Even though you know how the beats work, but playing without sound will be difficult.

http://www.agame.com/game/patapon-2

Even though I've played this game on the console, however I've tried playing the game without sound and still I am not able to hit the beats all the time. This shows the game audio actually plays a very important role in the gameplay. It can actually help user to adapt the game with audio indications.