Hey jeebs,
You're totally right about the clarity issues, I just updated the game and added a few little things to help with that, I already had a "jiggle" function built for the cards, so I added that to buttons on the Map screen.
Also, when you place a card next to any attackable enemies now, their border turns black and the card jiggles. (edit: Card jiggle might be causing a small bug right now, so this has been removed.)
Lastly, I did update the balance and tweak some of the card and Relic values - hopefully, your cards scale a bit better with the levels now.
There were a couple of other changes as well (you can now select a hero/starting deck at the start) and I'll throw more details in a devlog, but I wanted to address your suggestions/ideas directly too.
Thank you so much for the feedback and for playing! :D