This is demonstration of a multi-window prototype for HaxeFlixel which now works without leaking or crashing on HL and CPP on Windows.
This uses flixel, openfl and lime. Versions tested are:
haxelib list flixel: [4.11.0] lime: [8.0.0] openfl: [9.2.0]
It uses the technique of rendering to a camera which is off-screen and then copying its canvas to a Bitmap on the second window. Note that this will only really have any hope of working on sys targets. It certainly won't work in a browser.