Can I please have some constructive critisism on my artwork?

Question: Can I please have some constructive critisism on my artwork!?

Okay- So I'm a Senior- getting ready to submit an AP art portfolio, AND get an art portfolio ready for college!.!. I did this piece back in my Junior year, and I'm wondering if I should re- do the piece!.!.Now when I redo it, what are some things that I should change!? How do I improve upon this piece!? What should I keep the same!? Should I use the same media (colored pencils)
http://i151!.photobucket!.com/albums/s150/!.!.!.Www@QuestionHome@Com

Best Answer - Chosen by Asker:

Wow, that drawing is great!. It is so realistic, like a painting!. I like your use of color - it looks like it was done on the computer because it is so realistic! I don't think that you need to redo it unless you want to!. But your technique and style is great!. Keep up the good work!. You have talent!.Www@QuestionHome@Com

well i think if you are going to keep using the same tecnics, just keep it as is, but u saying u did this when u where younger and being a senior u maybe want to think about your style, and then is keeping the same tecnics GO FOR IT!.!.
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i dont think you need to change anything, it will change on its own naturally, if your redoing it, Www@QuestionHome@Com