As I've said to Alex in the Book Club thing, I really dig the concept and think this project has a lot of potential! I could see this being a very cool strategic roguelike battler, with a little more time and attention put in.
Balancing is tough of course, and plenty of areas would need some tweaking, but as soon as you get a little more variety, effects, and audio in there, I'd love to give this another Single Cannon Shot :)
Edit: totally agree with Draekdude on the full-on misses, I've never liked that kind of mechanic and think there are better options out there.