Okay, excellent news:
I managed to find and fix the battery usage issue as well as fix the crash when you clicked on the File Manager entry in the menu. Will upload my nightly build to Extras-Devel though I plan on doing some extra work on the UI to match the Harmattan UI guidelines since they seem to look pretty decent
Will also be looking into porting this app over to Harmattan on the N9/N950 which should be fun. Hopefully Harmattan doesn't have one of these "maemo-launcher" things which wreaks havoc with locking certain applications. I am still trying to figure out a way to fix that when I have the time.