Help me with trends.

I’m the kind of person that doesn’t play video games, doesn’t listen to music, doesn’t watch movies, and doesn’t keep up with the mainstream at all even though I’m heavily into making all those things (except movies).
As a result, I don’t always understand the context of some Ludum Dare themes. An example was ‘Tiny World’, people seemed to understand this meant ‘tiny revolving world’, which is a genre of video games I had no idea existed. The first time I saw one I though it was innovative, then I realized there were over 200 similar tiny round world submissions.
Something tells me it was a ‘thing‘ that I just wasn’t on the hip-enough band-wagon to understand.
Since the themes with the most ‘meme context‘ tend to win, can someone please help me to understanding the “meme context” of a few of these suggested themes?
A link or just a quick explanation as to where/why they came to be would be greatly appreciated.
Thanks!
With Alternative physics I mean: different/unconventional physics rules.