I had a lot of fun while playing this game with my wife. The art and climate reminds me Pegasus (or NES). I think you should definitely add some controls for diagonal movement, because we played on a laptop and ran into a death trap many times because of not being able to walk diagonally.
As for the stun gun recharge rate, I don't really know if it's too slow. It gives lots of emotions when you know you can rely on it maybe once a day.