This sounds like a...well, let's been honest it sounds like Haydn on ecstasy. It's not really all that classical, just happy. It has more of a video gamish feel. In any case though, it was a pretty enjoyable piece, even though not technically very proficient (see daniel's and montpellier's comments), and it also has a fairly apparent lack of structure. I would study some scores of Mozart,etc. if this is the path you want to take (thats what I did way back when
...like 1 year ago haha).