I enjoyed the whole game really, and well this may sound like a cop-out, I really think my favorite part about it was just how it got me into the indy genre of games. I was happy the whole time playing Cave story, because I've always been into retro games, especially metroidvania's. Before even picking up Cave Story I had played several hours of Castlevania: Aria of sorrow, and Harmony of Dissonance, metroid, super metroid, and the like. I first saw it while watching top 10's and lets plays. However, when I first looked it up, I happened upon the wiiware page. Thinking it would cost money, I decided not to get it. Couple years later, my friend downloads the demo on wii and starts talking about it. I decide to try it, since he hadn't been able to finish the demo yet, so we kept trading off whenever we died. I was quite a bit better then my friend, mostly because I've played many similar games. I beat the demo, and tell him he should get the game. I go home, look it up, find original version, and go through the game getting the good ending in 3 days. It opened up a world of single developer no publisher games for me.