You can contact https://itch.io/support by email to request refund.
Please include the purchase ID in your message for them to look up the purchase and process the refund.
I am so sorry that my projects didn't reach your expectation, I will try harder in the future.
Meanwhile I will renew the page with pictures. Sorry again for the trouble that caused you.
Remember to try the demo first before you pay, it is free. <3