Oh, different keyboard type. Then I can't really help, sorry.
Try checking the tutorial I guess. Only thing that tells you the binds is that so maybe it helps. (tho it's pretty broken so idk)
About difficulty, I dunno if you can change it mid-save. I assumed so since it used to be a setting you could change at your heart's content.
Hope you can figure stuff out. I'll try checking settings out when I can.