Hehey, I finally beat it! It required starting a third playthrough, but I eventually figured it out. I'll put my spoilery thoughts through rot13.com in case anyone doesn't want to be spoiled. Rest assured, though, this game is very good and definitely worth playing. But be warned, it IS very hard, and I'd call the final boss outright unfair. My advice would be to examine the environment of the game closely, and try using your power in different locations.
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Jung hygvzngryl urycrq zr jrer guerr guvatf: 1. V ernyvmrq gurer'f frireny oreevrf lbh pna svaq va gur pnirf. V jbaqre vs V'z gur bayl bar jub arire obgurerq gb purpx gubfr. 2. V ernyvmrq lbh pbhyq cvpx hc sybjref va gur sberfg, naq gung gur nern erfgbpxf sybjref naq snvevrf vs lbh er-ragre. Gung qrsvavgryl urycf lbh trg gb svtugvat funcr sbe gur obff. 3. V ernyvmrq lbh pna hfr gur punenpgre fjnc gb fxvc gur ragver gbjre. Gung'f n ernyyl pbby gevpx!
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V arire qvq svaq gur Qentba'f Oyrffvat lbh zragvbarq.