Re: #5 - the game is incredibly popular at the local high schools in my area. I was pretty surprised how ubiquitous the game was and that all, and I mean all, of the students knew what it was and had most likely played it.

The most interesting thing was how many different algorithms the students developed to try and solve getting 2048. Unfortunately they didn't know about the web version on Github which made trying them out much faster and fun than swiping a phone for hours.