Apparently, Vincent's "nightmares" in Catherine are a bit too scary. In a post on the official Catherine blog, director Katsura Hashino noted that fans have been complaining about excessive difficulty in the "Nightmare" climbing puzzle segments, even when playing on the easiest difficulty setting.

Hashino and the team wanted the climbing segments to convey the "thrill of a nightmare" and leave the player with a "clear sense of accomplishment," admitting that perhaps the staff had become too well-versed in the game to realize that it had become too hard for the people who didn't make it. A patch is currently in development at Atlus, aimed at balancing out this difficulty, so people can follow the story instead of merely falling from illusory block towers.