How can I hard code demo checkout and payment details for a demo store app?

Hi, I have a demo store setup for my gift message Kodie app, listed on Shopify App Store - https://kodie-app-review-demo-store.myshopify.com.

When the customers will visit my store, I want to relieve them of filling the checkout form and the card details for Bogus Payment method to save their time.

Is there a way to hard code demo details for both these forms ( checkout and payment form) so that the visitors can directly click on continue and view the functionality of app?

In case of checkout (names, address, city, etc.) and in case of payment (credit card no, cvv no, etc).

Thanks for any help.