Actually it looks like the publisher was WayForward. They might have licensed the emulator from LRG though? I'm not really clear. Sigma Star Saga DX.

@endrift do you want me to gift you the game on Steam so you can check?

@voltagex I ended up buying it and refunding it immediately upon discovering whether or not it used mGBA (it does. it straight up has the github URL in the file)