Pacman! I wanted to do Super Mario, but my husband said that wasn't retro. :P What does he know?
The base color is Sinful Color Black on Black. Everything else is done with acrylic paint or Migi nail art pens.
I made sure to paint white first, then color over it with the details so they would pop. I've heard some complain that the Migi nail art pens are watery--yes, they are when you first use them but just keep squeezing and the watery stuff will come out and they will work better.