You have 5 of the white 'star' blocks - try arranging it so one is in the center surrounded by the darker blocks, then the lighter cross blocks and a 'star' in each corner.
Also, in the top photo, bottom center block. The lower right corner needs to be turned. If you wanted it like that - wonderful :) if not, it would be easy to fix it before you put the blocks together.
Lovely colors and nice blocks. I'm sure how ever you decide to put them together it will be lovely.