I imagine that it's running the UAE4ALL emulator.
And preventing you access to AGA support is probably because the CPU isn't powerful enough for AGA and an 020. That seems to be the case with the Raspberry Pi as well.
The "matchbox" size case is much bigger than what I imagined. It seems bigger than even the largest box I've seen. Although matches do come in all shapes and sizes.
https://www.youtube.com/watch?v=CuMENlNFvocUsing that match as a guide you could fit quite a few A500's in a box.