i think you've done nicely but i don't think it's very special

On the smilie you used to much stander "blending options", try messing around more with the settings and realise there's more than just blending ops..
For the rest very nice work, and since you're 13 you did very well...
But there is a lot of improvement possible on your work as well on design-aspects as on technique but for now you did a great job!
Good luck!