Really nice arcade game, and im actually impressed by how you were able to implement an online highscore system, would you mind sharing how you did it?
Also, I feel that the borders of the map should be indicated more clearly in the game, since the entire map of trees and rocks look the same. Currently, the only way of telling whether you are at the end of the map is by looking if you are at the edge of the radar. The walls of the map should be indicated by something like a wall of trees or trees in a concentrated area.