I thought star wars was based off of TLoTR
Only partially. George Lucas grew up on the FG series, and it's presence in Star Wars is actually fairly obvious once you look for it. For the most part, it's based on that IP.
Here. You'll be able to make your own game (DMC-ish or otherwise) with this.
http://www.stencyl.com/
I can't promise that it'll be exactly like Muramasa: The Demon Blade, but you'll be able to create something that's at least on par with the old Ninja Gaiden NES series or the side-scrolling X-Men beat-em-up platforming games.
You can make a DMC game... you just can't sell it. And even if you gave it away for free, Capcom might still send you a cease-and-desist.
Anyway, it's not much, but hopefully this game creation program is easy enough for you to make something resembling your ideal (2D) action game.
So long.