The game is designed to teach the user to recognize all the 88 modern constellations, brightest stars and 110 Messier Objects by taking them through a number of levels.
- Three training and testing modes for each level (easy, medium and hard) to help you progress smoothly and guide you to eventually recognize the constellations, stars and DSOs in the real night sky.
Easy levels show the lines of the constellations, making the experience less similar to the real night sky, but it's the first step of learning.
Hard levels are closest to the real night sky: they only show the approximate location of the objects, instead of the exact shape (the borders), and randomly choose the orientation each time, so that you learn to recognize the objects from another angle.
Medium levels hide the lines of the constellations, but show their precise borders and the lines of the surrounding constellations to help the recognition.