This was a nice game, though it would have benefited from having the controls of left and right mouse buttons mentioned in the actual rules. It also would have been nice if we could see the enemies health number rather than just the bar. And lastly, while it's nice that when you're selecting new cards, you learn what they do, after that, it seems you can't see that again, and are only shown a question mark so that you know they do something extra, but not what.
While keeping it simple in terms of text is nice sometimes, I often was trying to remember what the icons next to my health were symbolizing as well as not realizing how the monsters were working until my second game around. But with that extra information helping remind you what does what, it would work as a very nice game, and it is already, it just is a bit more of a struggle.