Thank you very much for the feedback. I'm happy to hear you liked the demo!
You can also toggle windowed mode by moving the mouse at the upper edge of the screen. The browser overlay would also show up (a downside of running in a browser), but it displays the title bar, and you can toggle between the states. I'll add this to the top of the page.
As for your other suggestion, there are several new apps and features unlocking right after the demo ends, that will address all your concerns. The content here barely scratches the surface of what's already there in the full version.