Hi Flavia ,
I 've edited the design to be clear as much as possible,
- For the blurry image in the front cover ...I think this the best combination in order to keep the title and the image both clear.
- In the Inside page .. all your suggestions worked so well .. thanks so much.
for the second design:
I found the white background is the best choice to lighten up the cover and make the illustrations clear and easy to be recognized and also randomly distributed to make it more lively.
Any feedback will be appreciated ,