This is just a friendly note from the developers: there's an actual game manual that you can access at the Store page, in the right section; or in your game library, in a menu called by right-clicking the game; or in the title in-game menu!
Not many people seem to know this feature exist, as well as myself before I've published this exact game. Probably we're going to make a short in-game manual, too.

~Xitilon