As long as you have it saved as a UFO and resave often, you should be okay. Select the Path Edit Tool and drag the top central point down a little to flatten the top of the head. Drag the bottom central point down a little for the chin. When you have a nice shape, right mouse click, duplicate it and either put it in your Easy Palette or put it to one side. Go to the Object menu and select Convert from Path to Image.
Every critter has to have ears and they come next.
See, it looks like a bear's head already. Convert one of your ear shapes from Path to Image. Try not to get too close to the edge, because you want that area to remain nice and dark. If you get too close, just reburn it and don't forget that magic Undo feature. Place the smaller ear on top of the larger ear.