Thanks for this guide. I couldn't figure out what I was doing to affect the multiplier until I read your notes about pickups. Hopefully you have find time to work on this a bit more, but if not you've already made the game much more enjoyable for me. Thanks for making it.
Also, it took me almost 2 hours of play time to beat Original - Easy. Is that normal, or should I just give up now :P When I finally beat it I was already up to Option level 10 from repeated attempts. This is going to be a rough ride through advanced I think...