I did create an account to try it out. I like the premise. Sounds interesting. But the UX needs a bit of work.

You forcing me to create a card for each type in the beginning was irritating. I didn't need that hand-holding. You can have a 'help, if needed' that would walk you through the various card types.

Reduce the border-radius, it is too curvy (in my opinion.. but that's just me)

Why did you add all my cards into a 'deck' ... that wasn't explained. I don't think a deck is necessary ... or you can keep it, in case someone wants it.

When I enter into my deck, I can see the cards, but zero way of knowing which type of card it is... unless I click on the card .. .

there is no way for me to see all cards of a certain type ...

Okay, so the UX is definitely a work-in-progress - you need to fix it. But I like the premise..