I believe the problems you face are very much a consequence of the browser. I normally hedge against having a browser-playable version because 3D games, even if they work, will have problems. Unfortunately, we struggled to get Mac export working on time, so we needed the browser version just to clear basic requirements. While we seem to have eventually managed a working Mac version, it is simply too late to make the correction now.
The control scheme should have been made clearer, and our failure to clean up a lot of the debug details really hurts our overall polish too. I'm sorry about how much it hurt your experience.