I would like to suggest two things:
Sometimes (not always), the pause button (Esc button) is not working so I can’t pause the game. If that happens, I have to press the Windows key (next to the Alt key) to temporarily disconnect the game. When I reconnect, it usually works again, but sometimes the bug is still present.
This is not a bug. At the end of each mission, the medals usually say something like “Not using missiles, satellites and not dying in a single star system”. This is wrong because the entire mission is only played on one planet, not a star system. “Star system” should be replaced with “stage”, as the message “Stage Clear!” appears every time you defeat a boss.