This is a pretty nice hack overall. The graphics are interesting here, it really does a cool job at conveying a different atmopshere if compared to the generic smw hack. Design-wise it's not fancy, since the author just introduces the first world and half of the second. Yet, it manages to be a pleasant hack to play.
This is sure worth accepting, although I'd like to point out that some of the slopes you've set can be passable. In the two castles of the first world there is a slope that can potentially make you fall through the FG.