Moving:
When prompted to choose which way, press ^. Then, press I, J, K, or L to move or [Esc] to exit. This section of the game is different each time that it is played.

Hidden message:
Press 1, 2, 3, 4, 5, 6, 7, or 8 followed by [Esc] at the title screen.

Unknown:
Press C, H, S, or T (followed by [Esc] or by itself) at the title screen.