The typical "just add Cthulhu" approach would make Witchmarsh a mere sidescrolling shooter, although a charming one. It certainly looks like it's got one foot planted squarely in the sidescrolling shooter camp..
Had I known this existed I think I would have joined the Kickstarter. As it is I suppose I'll look forward to December. A Lovecraftian Metroidvania with a touch of Bioware? I'd only be more interested if they had Steve Meretzky on staff.
This is probably a pretty cool game, but the phrase "think equal parts Lovecraft and Wodehouse" really makes me want to punch someone. That's like "Billy Friedkin" times a hundred to me.
Because Jeeves (for me) is a beloved childhood character and thinking about a kind Jeeves type being menaced by an unspeakable horror makes me sad :( Wooster would have no clue, natch.