Thanks for trying!
What is the URL of this shared repo (this might be a too obvious answer, sorry).
About starting fast... the comparison will be more fair with Miniature 0.4 which actually plays real games.
Still, I don't see the booting time as a bottleneck in Miniature, although I'm sure there is room for improvement. Miniature is relying solely on dependencies available in the platform (the Qt stuff) and I guess that helps.