Great! Did you try to select a single character? The game offers a single player match versus a simple AI.
You are absolutely right about keyboard controls! Our intention was to have both buttons perform the same action (fire), but they are used differently while navigating the menus (confirm and cancel). We are thinking about how to streamline this and have a single button for the menus.
That said, we focused almost exclusively in getting the right feel with gamepads. Did you try the game with a gamepad?
Thanks a lot for the feedback! Let us know if you have more comments :)