Here is a little creation I made with a cheap orange candle.
I started off with a plain old jack-o-lantern face, but decided it looked a little too scary. I then just started cutting shapes out of black vinyl with my shape cutter. You can make this project super-easy by just tracing your design on the back of your vinyl (or paper), and then cutting them out and applying them. For extra cuteness, also try putting ghost and monster faces on different colored candles!