* bonuses
    * death game bonuses
* tanks and bullets speed balancing
* game series
    * clean player state on restart in classic type
    * network series
* map packs
    * import in game
    * save imported in local storage
    * database
* improve bots
    * A star
* game config validate
* additional weapon
    * mine z-order
    * spawn mine on tank back
    * check mine exist when spawn mine
    * double rocket
    * display count
    * bonus ammo
    * screen gamepad (button enabled, count label)
* ui:
    * game frame layouts