HN user
Just a regular linux user ;) Android / iOS Developer in my non-free time.
Might not call it bad, but you should really also learn JS - as brilliant as jQuery is, it can't really do everything. It's also much better to know js in order to debug stuff that misbehave (you can also download the un-minified jQuery code and just step into to it ... can save a few hairs off your head)
When dealing with games you will most likely want great responsiveness and performance. to trigger both of these you will want to go to the lowest possible level, this can give absolute control over what happens in your game- (mostly for the graphics and the logic engine - A.Is and such). you will also probably want better control over the memory usage, which (mostly) can be just easier in low level which c / c++ offers.