We do offer a sync feature to share progress, but if you're having trouble with it, please reach out to our support team via Happy Color's general settings, where you will find the "Contact us" option.
Thank you for your feedback, and we're really sorry for the inconvenience. We're taking the issue of not being able to save completed pictures and accidental ad clicks seriously and will work to improve it. We'll do our best to make the app more enjoyable!