Interesting Indie Game find KDR!
At least based on the video you linked, it seemed Revolver lacked level geometry? Flip The Core appears to be built more with level-design in mind, presenting you with a seeming-dead end, but allowing you to flip past it. One thing I noticed in some very early footage I had the privelege of seeing was that (at the time) you didn't die on contact with level obstacles, which, personally, made me very happy since that sort of thing kills me a lot in side-scrolling shooters and the game might give me the opportunity to flip myself out of such a situation.