Tiny Arcade is based around TinyScreen+, an Arduino compatible circuit board and display that, at startup, runs a menu created using Arduino development software. When necessary, the menu can be updated from a computer using the Arduino software- Here's how:
Follow the TinyScreen+ Setup Instructions - including uploading the example program to make sure everything is set up correctly. Keep in mind that the Tiny Arcade menu must have loaded a game before a USB connection will appear.
Close the Arduino IDE software if it is open. Download our current release of the TinyArcade Menu. Unzip the folder to any folder and double click on the "ArcadeMenu.ino" file to open it in the Arduino IDE.
Make sure that inside the 'Tools' menu in the Arduino IDE, the selected 'Board' is 'TinyScreen+', and the 'Build Option' is 'TinyArcade Menu'. With Tiny Arcade plugged into your computer's USB port and playing a game(not still in the menu!), you should see a TinyScreen+ port available in the 'Tools->Port' selection. Be sure to select this port before uploading.
You can now upload the updated menu to Tiny Arcade by clicking the round arrow button near the top left of the IDE. It may take a minute or more to compile and upload the menu.