Super Castlevania IV (Wii)
It turned out the spinny room was solved by just holding on for longer, as a platform eventually appeared. I’d obviously just got impatient and tried something else. I got to the boss at the end of the level (Death wasn’t it, it seems), who was a big golum thing that shrank every time he was hit. Thankfully, he was really easy, as I didn’t have much health (and no energy) when I got to him. So Level 6, and …