I think I really didn't understood what some enemies, or combat mechanics, are supposed to do or behave.
I believe the readability of the cards can be enhanced by using a better resolution (or be ilegal and just scale the asset)
And indeed, for me the Action deck became invisible and unclickable at some point, which I believe caused a softlock
But as I said, what I did understand was pretty fun to play, and I like the idea of building a strong defense in order to survive and buy time for displaying more troops, is a really solid gameplay loop