I just got the collection today and I noticed a few irregularities. First of all, the graphics glitch randomly. Like the whole screen kind of "twitches" for half a second.

Also, when I was playing Spark Mandrill's stage I was surprised when there were electric sparks running across the ground. The version that I originally played did not have this. I figured it ported another version or something of MMX that I didn't play before. The strange thing is that when I reset the game it switched back to the "easy" version. I'm not sure if this was a glitch or I pressed something. Input on this would be helpful.

Is there something wrong with my disc? It's a used copy and there are "dents" in the edge of the disc.

the screen twitches sound like they'd be the result of a faulty disk, but the electricity on the ground sure sounds like its meant to be there to me

I don't really care about the graphics glitching anymore since I've gotten used to them but the sparks got me a bit curious. I would like to play that "version" of MMX but I don't know what happened or if I did something. Does anyone know?