Controls - [Spacebar] to jump.
And yes, if they say you must work harder - that means you have to press [Spacebar] several times to jump. Thanks for your patience.
And yes. Reading whole bunch of text is essential for this game.
There's three endings in the game:
1) Submissive ending ("I regret nothing")
2) Martyr ending ("failed to find the meaning", SPOILER)
3) Rebel ending ("forever free", SPOILER)
Don't miss hidden character!!