Hoshi Saga is a simple game of discovery. One part point-and-click and one part puzzle game, the objective in each of the game's 36 stages is to find the star. How you go about doing that is different for every stage. The task is up to you to figure out how.
There are 25 stages to explore freely as you wish, with another 11 stages that must be unlocked by completing rows and columns of stages that appear on the stage select menu. The menu also shows the relative difficulty for each stage represented by a number of highlighted stars (out of 5).
http://ece4co.vis.ne.jp/sw/2007/05/post_16.html
