I read an article about Color Dreams somewhere once and the developers said that they had these two game testers who were really good at everything so they would always bitch about the difficulty, so this one programmer would always indulge them and try to make the games hard enough to be challenging to those guys, which is why pretty much all of the Color Dreams games were insanely difficult to the point of frustration.
That sounds like a flat-out lie, seeing as much of the difficulty from their games stems from their awful unresponsive controls and enemy AI that just does completely retarded shit.