Thanks for teying it out.
Because of work, I didn’t really have enough time to finish everything the way I wanted, so I had to put the tutorial only in the description.
As for the theme, I tried to convey it through the idea that the kingdom is sacrificing its people — essentially sending them to their deaths in exchange for the kingdom’s safety. I tried to hint at this with the messages at the beginning of the journey, as well as through some of the events throughout the game. In the ending, the boss also tells you the truth.
But I think I should have revealed all of this earlier and made it much more prominent.