I downloaded Floral Castle and I'm pretty much impressed. I see what you're going for with trying to mix grass and castle themes together, but I guess the way I would describe it is an actual mix instead of a blend; kind of like a salad or something. While I don't think this is necessarily bad or anything, it just kind of feels odd to me as it's a bit all over the place. I did enjoy this level due to the simple run to the end design, though it could have been made more interesting if the triggers were harder to activate and there were used for secrets more. As for the boss fight, the only thing I would say that could be tweaked is that there could be some sort of indicator for where the vines will fall so the player is able to plan their moves. Oh, and basically no complaints about the Yoshi coin placement - just this one seemed too easy to get:
Nice work!