Thank you for playing, and for the detailed feedback!
You're right about the ending: it deserves more than a dialog after all that work. I'll improve it.
For the hand cramps, you can move the view with the keyboard, and I just added a key that acts as a mouse click (C by default, you can add another one in the options).
And yes, there's a little bit of lore planned for the full game, through those special records.