A better analogy than music might be dance: The reward for dancing well is simply the feeling of dancing well. In a properly-designed game, the game feel of suc

A better analogy than music might be dance: The reward for dancing well is simply the feeling of dancing well. In a properly-designed game, the game feel of successfully completing the technical challenge is itself the reward. A dance that feels unpleasant probably won't be performed recreationally, and a game that doesn't feel fun to succeed at won't see much play.