private void manageGameState() {
        switch (state) {
            case INTRO:
                if (Keyboard.isKeyDown(Keyboard.KEY_RETURN) || Keyboard.isKeyDown(Keyboard.KEY_ESCAPE)) {
                    state = State.MENU;
                }
                break;
            case GAME:
                if (Keyboard.isKeyDown(Keyboard.KEY_ESCAPE)) {
                    state = State.MENU;
                }
                if (Keyboard.isKeyDown(Keyboard.KEY_RETURN)) {
                    System.out.println("GAMING!");
                }
                break;
            case MENU:
                if (Keyboard.isKeyDown(Keyboard.KEY_ESCAPE)) {
                    Display.destroy();
                    System.exit(0);
                }
                if (Keyboard.isKeyDown(Keyboard.KEY_RETURN)) {
                    state = State.GAME;
                }
                break;
        }
    }