Try to find three stars that form an equilateral triangle in the sky. Click on each of them (remark that several star triplet combinations might be acceptable solutions). If you click one star by mistake, you can unselect it by clicking again on it. If you delimit a wrong triangle, you get a pop sound, then get the chance to choose an other conbination; otherwise if the triangle is well an equilateral one, you get a brief sound sequence, 1 more point on your score, and a brand new sky to challenge you further.. If ever you feel stuck for a stage, click on the moon to initiate a new sky combination. You have 3 minutes (180 secs) to find the biggest amount of equilateral star combinations. Watch out, the rocket unselect stars when it touches them.
Inspired by my son Louison Thanks to Cramer for helping in providing the coordinates of the 3rd point of the "forced" equilateral triangle
