Great. Also familiar.
I'm not doubting that you did this yourself, but the cards and engine are copied from Moonkey's Monster Master: newgrounds.com/portal/view/377987
You have given the game a lot more polish, and all the graphics are improved. It's also harder than the original game, and you added a gold system. But I'm bothered that you didn't mention Moonkey's game in your author comment or anywhere in the game because you took intellectual property from it.