Very interesting real time card strategy game! Played through it on difficulty 1 and 2.
Difficulty 3 seemed impossible, because once you had 4 enemies against you with just the starter deck, they'd kill you in one turn even if you go for full defense. I also only played with card cost on.
It would be great to approximately be able to see how much damage the enemies are going to deal (maybe in a range from y to x), just so it's easier to decide how much you want to shield up in a round.
Another thing that was rather frustrating than fun was, that single target damage would switch targets. That essentially made single target damage very weak compared to multi target damage, as you are never able to kill anything.
I prolly experienced a bug at the final boss, because cards I played kept returning into my hand. So I could quickly stack infinite energy and shield with two cards and just steamroll the final boss.
You always healed to full after a fight, so healing at the campsite is prolly a remnant of earlier development.
I'd also wish to be able to deny card rewards after a fight, because some good decks of mine got ruined by suddenly getting 6 repairs from 2 fights :D
But all in all a fun entry, and I can see it being developed into something very fun.