Neat game! Personally, it made me think a bit of Metroid II on the Gameboy (probably just due to the monochrome palette and references to temples and citadels), whereas the colors when you go luminous reminded me of VVVVVV. For a game this short, I felt the difficulty of the controls (like the slow sword swing forcing you to press the button a bit ahead of time) are a bit of a feature rather than a drawback. First, they add to the retro vibe. Second, they help to simulate the frustration with trying to achieve perfection. With practice, I was able to achieve the precision necessary. (Love how the companion guy's comments are a great illustration of self worth issues).

So, I've reached the circular ending, the Dark and Cold ending where you fight but fail to defeat your companion, and (after some practice) the Perfection ending. Is it possible to beat the companion, and does that lead to the fourth ending? I'm not sure I have the platforming chops and patience to keep trying myself, the dude is just so fast. If anyone has found a video of the other ending I'd love to see it.