#4 Missing Navigation Buttons

[Angel]

There are no buttons displayed for the users if they want to restart the stage, go to the next one or navigate to the previous one. That may confuse the users if the don't know that the buttons R, N and M match the "Restart", "Next stage" and "Previous stage" options respectively.

A menu bar could be implemented at the top left of the screen in order for the user to have access to it any time.