80's arcade game
Gameplay is within a number of 'courses', and each is divided into 26 checkpoints, named after the letters of the English alphabet. Of these, the five major checkpoints--E, J, O, T and, Z--denote a new 'stage' with a new background and theme; for example, the third stage starting at J introduces mines. The top portion of the screen shows a timeline-style map of the course, with the five major checkpoints clearly marked. Above the map is an indicator of the current checkpoint, the time spent in the stage, and three indicator lights: the top light indicates upcoming enemy aerial attacks, the middle one indicates an upcoming minefield, and the bottom one indicates enemies approaching from behind.
At the end of a stage, that time spent is compared to the average, and bonus points are awarded accordingly; completing an entire course gives an additional 5000 points. There are two unique courses: the 'Beginner Course' and the 'Champion Course'. The Champion Course 'loops' forever, and each loop is numbered for convenience.