Daily UI #2 - Checkout

Balsamiq was used to build a low fidelity prototype, afterward, I generated the high fidelity prototype in Sketch.
For the checkout page, I specifically focused on mobile checkout which is more challenging compared with web checkout as you have to present lots of information on a small screen without making user feeling uncomfortable. Things I consider when designing the checkout page:
1. Make the buy button recognizable
2. Ensure the total price is visible and put it on the top of the screen
3. Provide users with multiple payment methods
4. Add scan card function so that users do not have to type in their information which is helpful for mobile users
5. Utilized the geolocation came with a mobile phone that helps users locate themselves so that they don't need to type the address.
I'd love to get some feedback from you guys.