Nice surprise to find a setting for CPU priority. I have the screensaver "Plasma" set to max zoom, medium quality, very slow changes in use as my background, and it was devouring the CPU cycles on my Mac mini's G4, but once I set the priority to 20 (very low) the system is nearly as responsive as it's ever been, and I have a constantly, smoothly changing background color. Very nice.

One comment about installation: you may consider adding an installation instruction saying to just drag the app to your Applications folder. It's pretty obvious in the end, but I sat there a few minutes trying to figure out if it was some kind of special plugin, menu extra, etc. that belonged in the /Library folder.