Hey!
I finished analyzing the results of my experiment, so, I thought I would share them with you, as thank you, of sorts, for your help.
As far as I can tell, your game doesn't cause nightmares, sleep loss, problems with getting asleep. So, it's probably safe for children to play. That being said, from other data I've collected, it seems that people who game more, are less satisfied with the quality of their sleep, but actually have better sleeping habits then the rest. Take from that what you will.