DescriptionThe cube surface is the simplest and perhaps most natural example of closed surface endowed with a flat metric with several cone-type singularities. We study the qualitative and quantitative behaviors of geodesics on this surface. We focus on uniformity(=equidistribution): given any ”nice” test set, when the length of a geodesic goes to infinity, is the proportion of the geodesic that lies in the test set close to the relative area of the test set? Ergodic theorists have given a qualitative theory of non-integrable flat dynamical systems. With our non-ergodic approaches, we give many time-quantitative results. In this paper, we introduce several powerful methods for this problem. One of the most interesting ideas is to use representation theory to utilize symmetry.