Wow. It's a short game, but there's a lot to say about it.
[SPOILERS]
Everytime you make it a step further, you get a very rewarding "Ah-ha!" feeling. It starts first when you understand you can type words into the void, then that you can type multiple ones, etc, and eventually, when you understand where the final words are... Wonderful.
The visuals are simple, but at least everything is understandable. I liked the music that plays when the loop is close to restarting as much as I hated it (because it meant my current iteration was close to the end). ^^
The only thing I would complain about: fast typing in the void. English is not my main language and even though I can type relatively OK speed-wise, I had trouble getting three words in before the loop restarted. This wasn't game-breaking for me, it just took some retries until I got it right, but I can imagine some people could be blocked because of it.
Apart from this small flaw, I really liked your take on the theme, and was very touched by the ending message, great work! =)
(Btw, who is "she" that waits for me in the abyss? I tried to jump into the void at the end of the plane with MOVE + ALONE but there was no one below :c
Open-ended easter egg?)