Thanks for the feedback! I was thinking about writing a more detailed manual in addition to the in-game help before releasing, but I did not do it for two reasons.
First, I’m not sure if the short version is just enough for players to understand the basics of the game. And I’m afraid that explaining everything in detail might spoil the fun of discovery. Second, I intend to print the help text in one screen, and leave the longer description in a separate file. But I wonder how many players will actually read something outside the game?
Anyway, it’s not that hard to explain the mechanics. I think I’ll make the game more welcoming to players. :)