Hello! I am glad you are enjoying Title Update 5! Admittedly I have not been updating the itch.io page since I released Tiny Pixel Planets on steam, however, The bugs you addressed have been fixed in TU5.2 which is the version on steam (except the buggy music, I will look into that). I will try to get TU5.2 released on itch.io soon, or at least a update explaining what’s going on. As for the ruins on the endgame planet, Tiny Pixel Planets takes place before Island Builder Legacy, however the planet the ruins are on is the same planet Island Builder Legacy takes place on (Hence why there is a trinanium shard there which is what powers the core).