We had remarkably similar ideas for our entries! The art and character designs are all great! I'd say though, if the combat is going to be purely random like it is now (At least I think it's purely random, I may have missed something), I'd make the fights a lot shorter.
Also- it can be a little unclear at times what arrow key you need to press to navigate to certain buttons. The Blackjack Hit/Stand buttons are a good example. The Stand button is below the Hit one but you have to press right to get to it.