I was able to pick it up quite easily and understand what was going on. Perhaps the green goal orbs could distinguish themselves a little more than the planets, but other than that - it made sense. I felt like I was cheesing a few of the intro levels by making several satellites at once (not getting all the orbs in one go), however in a later level that didn't work, and I got a little stuck. Perhaps there's someway to communicate on the goal orbs "you have to get all these in one go?" Anyways, nice little puzzle game. Here's a playtest