first, unfortunately I can't do any testing. I used up the demo and had loads of fun every second I used it. Second, yes that's what happened except that it was invisible until I clicked somewhere where the OS cursor would be off the window, then the game would pause, the OS cursor would appear, and the active app would be finder. If I moved over a button with the game cursor, the button would light up but when I clicked on it I would find out that the cursor is actually lower, which is how I found the bug. To get to options to turn back on full screen, I had to find the button with the invisible OS cursor, and click really fast because when I moved over the button with the OS cursor it was only active for a short second before I'd have to move the mouse again and click fast to click on the button.