Flow is one of the fundamental reasons that people play video games.[23] This is especially true since the primary goal of games is to create entertainment through intrinsic motivation. The use of flow in games helps foster an enjoyable experience which increases motivation and draws players to continue playing. Game designers, in particular, benefit from integration of flow principles into game design.[24] Games facilitate flow as either an individual or group activity.

Flow in games has been linked to the Laws of Learning as part of the explanation for why learning games (the use of games to introduce material, improve understanding, or increase retention) have the potential to be effective.[23] In particular, flow is intrinsically motivating, which is part of the Law of Readiness. The condition of feedback, required for flow, is associated with the feedback aspects of the Law of Exercise. The positive emotions associated with flow are associated with the Law of Effect. The intense experiences of being in a state of flow are directly associated with the Law of Intensity.

Unless of course, the emotions associated with the law of effect are not so positive

Which happens pretty frequently, actually.

Cue in Happify?

What is Happify?