Having been using this for about six weeks, I find that I still have only 40 as my highest score, but it is extremely tempting to waste many hours attempting to improve skills.
It would be useful if the menu could list the keyboard commands, to vary size etc. or remap keys, as I have managed to now have it always load with a blacked out screen after attempting to blindly experiment with the preferences. So time to download again, so that I can actually see what is happening.