Just a quick note, this uses Direct X on your graphics hardware, so if it doesn't work, that's where to look if you want to troubleshoot. Some hardware may not be able to handle it, or handle it well. Today's GOTD used less GPU [Graphics Processor] than the usual from Desktop Paints, but GPU usage tended to spike depending on what I was doing -- it didn't show any GPU activity just sitting there, but as soon as I started opening/using software GPU use spiked to the high 90% range, so you might see some lag with it running.
Also bear in mind that graphic hardware can use a lot of wattage & generate a Lot of heat. Current CPUs & GPUs save power by throttling back whenever you don't need everything they have to offer -- running D3D wallpaper or screensavers will usually kick your graphics hardware out of power saving mode.