export declare enum ObservableTypeEnum {
    alienBossDestroyed = "alienBossDestroyed",
    alienCreepLeftBoundary = "alienCreepLeftBoundary",
    alienCreepRightBoundary = "alienCreepRightBoundary",
    alienDestroyed = "alienDestroyed",
    alienDrop = "alienDrop",
    bombDropped = "bombDropped",
    displayScore = "displayScore",
    gameOver = "gameOver",
    gamePaused = "gamePaused",
    gameStarted = "gameStarted",
    keyDownEvent = "keyDownEvent",
    keyUpEvent = "keyUpEvent",
    missileShot = "missileShot",
    moonDefenseDestroyed = "moonDefenseDestroyed",
    spaceshipDestroyed = "spaceshipDestroyed"
}