In iOS, the Control Center and App Switcher interfaces are separate from one another and this means to get to one or another, you have to use a different gesture. It seems like some improvements could be made by merging the two interfaces into one, as we've seen with the popularity of previous jailbreak tweak releases such as Auxo 2 & 3.
A new jailbreak tweak called Zentrum is now available in Cydia's BigBoss repository for $1.99 and it introduces users to an all-new omni-interface for multitasking, viewing music controls, and accessing system toggles & shortcuts, but it even bakes into the mix a quick app launcher, which you can configure to your liking.