Everyone uses the ‘Starling’ project“
Is’ nativeOverlay ‘used to display the’ UI interface '?
Using the native overlay is certainly an option. However, many use the Starling version of Feathers, which is rendered inside the Starling display list instead of the native overlay.
Including your UI in Starling will be better for performance than including UI in the native overlay. In Flash/AIR, the native overlay is not GPU accelerated and will be rendered in software. In OpenFL, the native overlay is GPU accelerated, but the GPU acceleration in OpenFL is not as well optimized as Starling.
Yup, or built a bespoke UI right into Starling using purely graphical assets.