You'll probably not be surprised at all, when I tell you I like your take on the theme :D
I love how we essentially had the same idea, and spun it in different ways! I guess looking at the stars with a close person stays with you :)
Our approach to audio was also similar- calm background and "sparkly" star sound.
As for the graphics- loved it! Only think I'd add is maybe a small animation for when you find a constellation- like one of the boys pointing up.
As for the gameplay- I'd only add one thing. Some kind of hint mode? Like if you spend a long time without finding the constellation, the other guy could mark one of the stars for you.
Over all- another great submission! Keep it up!