TickTock | 알람시계 앱 -

The proper way to have rate limiting is:

That looks a lot like javascript, so perhaps Array.map:

The code in the main method will have a line that says runApp(...). The value of the ... is a widget that will be treated as the root widget of the app. In theory, you could just take that widget and pass it to your Navigator.push method and it should treat that widget as any other widget.

That being said, real life probably won't be as clean as this. There might be some initialization code in that app's main method or root widget that won't work properly if the app has long since already been initialized. Since virtually every Flutter app's root widget creates a WidgetsApp (or one of its derived classes MaterialApp or CupertinoApp), there might be some conflict that arrives from having one of those widgets being inserted as a descendent of another one of those widgets.

The game in question may work simply, or it might take some tweaking to work properly. That's something that will depend entirely on what app you are trying to embed into your own, so the only solution is to try it out and see for yourself.