NOW:
    - options panel
        - FX volume
        - touch : dow -> show, up -> (action | reset)
    - Animations
        - attack
        - promote
        - selected Hex
    - Ace overlay -> may reroll the dice
    - add options to hide moves/targets/assists even in action

NEXT:
    - support different board layout
        - north orientation
        - hex orientation
        - inverted even/odd row scheme
    - automatic overlays to show unit stack depth