Metro Card UI

Hi guys!
Here is a concept of ui of metro card vending machine . The challenge was to design the workflow for somebody either buying or topping up a metro card using a touch interface on a proprietary screen in a metro station.
Please check it out https://xd.adobe.com/view/f0faa129-ad8f-4e2b-632c-f0a987d7bb8f-86cb/