For years I searching any purpose for OSH park 0.8mm board service, finally I GOT IT !!!!
You can make fake micro SD cards
Main board carry speaker, display, power and switches,
CPU (attiny85) with game is on Fake micro SD card.
Dimensions: 2.4063 sq in (2.2127in x 1.0875in) / 1552.45 sq/mm (56.2mm x 27.62mm)
For more fun I have card with atmega328 or attiny85+DS3231 ... or DS18b20 (coming soon)
Working on SD card with STM32 and SAMD21
All game device have usually only one game, for change you need computer, now you can have unlimited games or apps, 1$ / games.
Now you can found more than 20 games for attiny85
with 328 card you can play DOOM https://github.com/daveruiz/doom-nano
Or you can play games for ARDUBOY (working on compatible library)
Also you can use it as development platform micro SD interface can access to 8 wires.
Games come from genius Daniel Champagne
Project inspired with https://hackaday.io/project/159741-tiny-joypad
- 2x micro SD slot
- port Arduboy games to Atmega328 card
- direct display connection
- suport for Lion battery and charging