Thanks for playing! or trying at least. Yes we should've added some tutorial. The premise is, you build sun collectors to gather sols, and use sols to build other more ships. To build, you select a planet and choose which type you want to build. After the ships have been built you can select them by interacting with the planet and then send them by moving your cursor to a different planet. Then, you will conquer other planets and you can use them to build as well.
Left player select being broken could be a bug, but we've never seen anything like that. If you could add a screenshot it would be awesome so we can fix it!