progression

Last week while playing exanima, i thought of a quite fitting progression system for a game like exanima/Sui Generis: Imagine that there are weapon proficiency levels - swords, axes, spears etc. We all start with 0. Each enemy killed ( or strike on a un/living creature) grants some amount of...

Does a 6th level exist? I've killed the blue eyed golem, and all the guardian golems on the map. I've found the key to unlock the long hallway with a symbolic door at the end. Could this be the door that will lead to the next level in the future, or am I missing something? :O