This app is made for the devices which do not have the brightness adjustment slider in the notification panel. This app brings a similar slider to the notification panel in the form of a notification. Brightness Slider Control aims to mimic the functionality of those sliders/controllers found in Samsung, Motorola, Nexus and other devices and delivers it to those devices which do not have this functionality e.g HTC phones.
But due to some technical limitations imposed by Android OS, it is not possible to mimic the exact behavior of sliding. So in this app we can "touch" the slider panel to change brightness but we cannot "slide" it. The default behavior of every ordinary notification is that the user dismisses it by sliding to right or left. We cannot replace this functionality with our own. So unless Android allows it, we can only use the "touch" gesture.
You are strongly encouraged to report any issue and submit your precious suggestions on this thread.