pouët.net

Have you seen it??? New demo platform???

Hackaday:
https://hackaday.com/2018/06/27/esp8266 ... cted-gems/

Webpage:
https://basicengine.org

Specs:
ESP8266
63kb ram
build in os+basic
160x200 to 508x240 x 256colors
32x32 sprites
wavetable (custom soundfont possible)
small as RPI
cheap max 15 euro for kit
PSX gamepad port
ps/2 keyboard

More infos on their page.
If someone will build it I will buy 2x complete...