Few days ago i replayed this gem again and i found myself having problems with its difficultly level while battling bosses (i'm getting old and i'm not as good gamer as i used to be haha). So i started messing with user_config.cfg file. And i've discovered this:
Change seta game_timeBeforeRegenerate "1.000000" to seta game_timeBeforeRegenerate "0.000000" and your life bar will instantly replenish itself.
Or just lower seta game_timeBeforeRegenerate "1.000000" value to your desidered level and health bar restoration time will speed up ...
Maybe someone here will find it useful...