Concept art for a game I'll make someday. This one in particular I've been working on for years, mostly on paper, although the soundtrack is farther along than just about anything else. It's called The Cornelius Prophecy, and it's an RPG based on a character who can transverse multiple overlapping dimensions at will.
It's kind of hard to explain, but it has a lot of platforming elements based on this ability. In an oversimplified example, you might want to get to the top of a tall tower. But since there are no platforms along the way, it looks impossible. However, in the next dimension over, there's a set of stairs that lead up to where the tower would be, although the building has long since collapsed there. So, shift over to dimension 2, climb the stairs, jump, shift back midair, and land on the tower's roof.
Now imagine that dynamic in more complicated scenarios, especially fighting against enemies with the same ability. I think it's going to be really cool. ..If I ever get the chance to make it. Btw, this one's copyrighted and everything, but that's because it's part of a portfolio I'm sending out to some game companies. TCP is my baby, and I'm not okay with anybody else making it or using the idea.