The only real problem you might encounter when doing the MODERATE challenges is the last one. In it, you have to hit the "hidden type" arrows so they appear in a white color about half-way down the screen. The problem is that the background movie is mostly made of light hues so seeing the arrows becomes a problem. To fix this go to options, then graphics and begin to mess with the BG options. I personally turned off the BG Movie, BG Dancer, and then put the brightness down to 0. You will then play with a solid black screen with easy to see white arrows.