I really like the subtle effects like the ghosting and the dot matrix lines.
But this game is LOUD. I had to turn the volume all the way down to make it bearable. By the way, you can control the volume of the HTML5 audio pipline you set up in retro.min.js in the function "sound" by using the gain node. Set g.gain.value to something between 0.0 and 1.0 to control the volume.