Here is what happened when I simply increased the contrast (under Image/Adjust/Brightness-Contrast) to 100%:
|(Click on pictures for larger view.)|
And you know? I like it better. The high contrast suits the mood of madness implied by the animator's expression.
I then tried one more thing--I wanted to see how the image would look without color. So: Image/Adjust/Black and White. This give you a popup panel with sliders not only for yellows, magentas and cyans, but also greens, reds and blues. I tried pushing the Yellow slider almost all the way to the right, and it naturally brightened the whole area where the light is radiating up from the animation board.