I've done something like that for Ludum Dare: It's a little point and click where you need to open 2 windows. The windows interact using Local Storage and you can click and drag stuff between them. You can download the .capx and see how I did it
That is encouraging. Hopefully Construct 2 will provide for my needs.
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Using Construct 2, is it possible to have a game create a popup window which is not nested in the main game window, but can be placed and moved beyond it independently?