I enjoyed your game! The aliens were really cute, I particularly liked the way you can move around in the menu... It almost works as a tutorial on its own!
I think the gameplay could benefit from some audio and a little bit of visual feedback, like a flash or a sparkle of some kind when you meet a friend. Obviously time is limited, so you had to prioritise, but I think you've done well.
Otherwise this is a really nice piece. Well done! :)