here is a link to the sequel...

http://www.newgrounds.com/portal/view.php?id=140341

just click 'watch this movie' ...there's also an easter egg (a hidden scene) if you go frame by frame when Voldy attacks Snape, when the green lazer thing is the shape of a pentagram (kinda star shaped) click on it and it takes you to the hidden scene of Ron

oh and it has a kinda violent ending, at least in my opinion, so I'd say it's like a pg-13 sort of thing