Unrelated to this, but not sure where else a feedback form is? What is probably the most frustrating game is the you can only move or attack. Maybe I'm spoiled by SRPGs like Fire Emblem and Menace and what not where you have to balance your action points. But basically you need to wait for the enemy to come since the moment you summon, they get in your face and you start trading blows.
Also it would be nice if you could risk your avatar by moving him out of his tiny green box at the end and just attack too. Let players decide whether they want to risk or not.
The most confusing bit was though how in the first battle I had 3 monsters. my avatar +2 others. then I won (didn't lose any in combat) and in next battle suddenly I only had my newest card and my avatar? I went somehow from 3 monsters down to 2, but it looked like I had 5 in my deck?
Outside of those complaints I really like the simplicity in the setup and the straightforwardness of numbers. Just missing a bit of synergy (e.g. if you have 2 wolves together they get a Pack bonus, or if you are behind enemy then you get +1 damage, making it riskier to leave your avatar open, but makes attacks more rewarding, etc.)
Overall it's in a pretty decent state. I also would speed up the UI a bit more. The scroll opens and closes pretty slow for the combat log.
Keep it up!