O.H.
My kids are 14 and 11. We don't have set rules but homework and chores must be done first. They also need to do something physical. Like my son will have the neighbor kids over to jump on the trampoline or he goes over there. Same thing on weekends, just depends on what we are doing. I don't really see the difference between them on the video games and us watching cartoons all day when we were little. I guess if it makes him "moody, intense and high strung" I would monitor it more and limit it. Good luck.