I can't figure out how to stop making ships; Right-click doesn't go back to a default pointer mode, left click & drage doesn't select a group of ships or planets, pressing ESC leaves fullscreen mode, which forces me to bring back fullscreen mode every time I try to use ESC to make the pointer work normally again.
This is a sandbox game, so do whatever you want. You can customize different civilizations however you like, double-click to rename them, and watch as some end up with everything and others with nothing - but the ones with "nothing" will actually have more resources, ships, etc. A tutorial will also be added in the next update.