You may want to make it more obvious this is a native Mac app, not cross-platform. I ignored the window decorations and shortcuts (like I usually do), as those

You may want to make it more obvious this is a native Mac app, not cross-platform. I ignored the window decorations and shortcuts (like I usually do), as those are commonly shown under the assumption of the developer's preferred OS; there's no definitive statement that this is a Mac-only app until the very bottom.