This is a simple plugin which allows you to have a playtime window in your menu, as indicated by the screenshot below:
Spoiler
It will work with any resolution. Mine is 912x720, just for reference. This plugin is fully compatible with my Menu Location plugin. If you need to change the location/size of the window, I would recommend using the Super Tools Engine by SumRndmDde.
This plugin also works with Yanfly Engine Plugins, which can be found @ http://yanfly.moe