Wow, really cool game. I really like the turn based approach and the graphics! Here is some minor feedback which might improve the game:
- If you have a game which is mainly controlled by the keyboard, make sure that you can do everything with the keyboard. You could have used ENTER or SPACE for "Replay".
- Keep in mind that some weird countries (including mine :)) have a QWERTZ keyboard layout. When you use Y or Z in a game always make sure both keys work.
Congrats to this very well made and fun game!