I am running the games from the preloaded microSD card and I am looking on the Tinycircuits Web site to find the files to download to the microSD.  Help.

Oh, forget it.  I found it through the Kickstarter site.  https://tinycircuits.com/pages/tinyarcade.
And it looks like my preloaded micrSD had all the same games at this URL plus two preloaded videos.

Erik Decker has some neat stuff that he is working on too:
http://tinyduinogames.de/

I thought it would be handy to put the direct link to the SD card games file here:

https://cdn.shopify.com/s/files/1/1125/2198/files/TinyArcadeAllGames.zip?6453075709680806705

What are the details for putting games on the SD card? I initially put the games folder extracted from the zip file onto the SD card, and it didn't detect the card. (This was after doing the Menu update: https://tinycircuits.com/blogs/learn/171319495-tiny-arcade-menu-update )

I then put each game folder onto the root directory of the SD card. That made it happy. This tidbit might help someone else save a few minutes.

I assume the card must be FAT32 formatted as well.

Just got everything loaded, thanks for the links that was helpful.