I created a functional prototype of the mockup locally and I've attached a gif of it though I think using up-down sliding/swiping would be a generally bad idea because:

# It'll work weirdly on mobile because users are used to swiping horizontally as opposed to vertically when it comes to a constrained space like our small sections here. Swiping vertically is most efficient and best when it's used to 'scroll' as opposed to swipe.
# It's hard to implement with the current carousel library we're using and would add to the technical debt even if we were to somehow pull it off.

So for starters, I've made it swipeable for now and it functions pretty well. Let me know what you think about it so we can finalize it and deploy it.

https://i.imgur.com/NdK18Nk.gifv