Took Me a while to understand it, Nice Work
Yeah, the gameplay part of the game was going to heavily tutorialise this:
* your starting hex would crash land on a planet next to two rocket boosters, which the game then directs you to snap to the sides of your hex
* you can then fly the ship to search for more components (orange arrow applies thrust, blue arrows rotate, although there would also be keyboard for non touch devices)
Unfortunately as I didb't get as far as making the flying around part of the game, this tutorial also didn't get made. I'm glad you were able to figure out the yellow circles were showing attachment points to select, I probably should have made them pulsate to make it more obvious.