Try installing Showcase by Amarullz, you can find it
here. Install version 1.0.1b not the 1.1.0 version. A number of people have had weird issues with the 1.1.0 version where as the 1.0.1b version seems to work perfectly for the 6.5 ROM's. Been using it now for the last month on all the ROM's I've tested.
If your interested in my configuration options, let me know. Right now I have it setup so that the upper right corner performs as the Close App button when I tap it.