This achievement is for clicking on the moving objects on the title screen 50 times. This will pop this achievement, but there is one for getting 200 (Godlike!) as well, so you should probably keep going after you get this one. There is also an in game achievement that will pop at 100 objects. Getting up to 200 should take you in total around 10 minutes or so.
If you have any ideas on how I can improve this solution, I'd love to hear them! There may be something that isn't here that should be, or an easier way of doing this. I'm always open to suggestions. If you notice any typos or poorly phrased sentences, please let me know.