First of all thanks for the samples! I have made available the first EmuELEC test image for the Radxa Zero. I am using the 4GB version for this video but the 2GB should also work the same, 1GB might work but you may run into some slight issues.
I am very impressed by the performance of this board considering the size, I have a video I will upload soon, I just need to find time to edit it.
In case you don’t know about EmuELEC, it uses CoreELEC as base and it’s basically a RetroPie system for Amlogic devices (and some others here and there), It’s made specifically to be able to emulate retro games.
I hope a 5-7" screen that solders to the GPIO becomes available sometime in the future because I think this board could really make a nice DIY handheld console.