Sprite Stitch Board!

Hi everyone !

I have a work to do for school, and I'd like to make a cross stitch with this picture (the image is really big, you have to click on it to see it completely, sorry ) :
Is it possible to get a pattern of it, with about 30 colors, or less if it's possible and if it looks well ?
I'd like it not to be more than 20cm x 30cm, and I use a white Aida fabric (14 count)

Thank you, and sorry for my bad english (I'm French ><)

This is not an easy picture to resize because it was saved as a JPEG. As the shapes are pretty simple, I would just map/estimate the pattern by hand.