The games were familiar and fun helped them stop clutching the mouse like it was, -I don't know, something that was trying to escape.
Didn't know until now that it was purpose-built for teaching.
I also think they forgot or underestimated the most important factor which influences the feeling of ease or neural fluency - familiarity.
They've learned their lesson as instant Familiarity is a chief goal behind windows 10.
I'm not a fan of the new Start Menu, but with pinned shortcuts to the task bar I don't see it very often.
It took me all the way to Windows XP to learn that you can right-click in minesweeper. I showed it to a friend, and he told me that doing that was cheating. No one in my family knew about it either.
So my take is that they could have made the concept clearer.