Sonic CD is my least favorite of the classic games, but I still kinda like it. It was the first game I bought for my iPhone 4 back in the days; so I'm pretty nostalgic about it too, even if I'm not from the same generation as a lot of you guys Still, yeah... level design's a complete mess. No sense of rhythm or progression like Sonic 1-2-3K, you just kinda awkwardly jump and run between arbitrarily placed set pieces and eventually reach the end of the stage, which somehow manages to never be satisfying, no matter the level. I dunno, I never felt like I overcame a challenge when I finish a level in Sonic CD, it just feels like the game is done toying with me for now and is gracious enough to let me proceed to the next level. Rinse and repeat for an hour or two and you're left with an overall frustrating and tiring experience. Even nowadays, where I'm good enough to finish the entire game in around an hour and without losing a single life, I still don't feel like I mastered the game. Who knows, maybe I need to play it even more. But I don't feel that way at all when playing the megadrive trilogy, or Mania for that matter. These games, I mastered them; I can feel it. Sonic CD...not so much. 8 years later, and I still feel like a bitch playing it. One the other hand, the aesthetics and the soundtrack are something else. It might be nostalgia talking, but I truly feel like there's no other game like Sonic CD out there. It's really the only reason I pop in the game and do a 100% playtrough every few months. So yeah, a bit of a mixed bag for me. Not an awful game, but definitely the weakest of the classic games imo.