It's not so bad.
I can't criticise your animation (because I'm not able to do thing like that) but I have at least one advice to give you : Your drawnstyle for your backgrounds is a bit weak. Your perspectives are wrong and the style doesn't fit with your characters.
It's a good start for a 16 year old, it's true, but think of what I said, I realy think you could do better.
Keep it up and practice