The author of the original post also wrote a review of Cave Story. It's long and rambly and exasperated, more impressionistic than informative, but it's a good read:

http://www.actionbutton.net/?p=416

Why did Pixel make this game? Like, why the fuck? The amount of loving attention to detail that went into this game indicates that the man, beyond a shadow of a doubt, possesses the mental fortitude befitting a researcher in a facility in Antarctica, delving into the permafrost, seeking the Cure For All Cancers. Why did Pixel bother making a videogame, when God had given him this situational opportunity to Literally Save The World? At the very least, the man could have sought out the Ultimate Toothbrushing Solution — a three-second-a-day quick rinse that eliminates the need to brush your teeth, while also keeping them sparkling white. (It’d be like those antibacterial hand-wash-lotion things, only for your mouth.) Instead, he made a videogame.