Oh man, PlayShape's Legend of Krystal really takes me back. I still remember the LoK forums that was spawned by the release of the game.
Was playshape's LoK unfinished? I kind of recall it was not. It must have been a decade ago, but I do remember that it was mostly a sex simulator, go around and basically collect the scenes. There was practically no gameplay to speak of, save for the progression of porn. I realize 'gameplay' is a wide term, but in this sense it describes an open rails system sort of in a way a virtual novel plays. You're just in it for the ride.
What would PlayShapes have done if they were motivated to do more to the LoK game? I sure do not know. It already had a core gameplay, and that was get fucked as a blue space vixen. I believe that many game sequels try their best to follow the core gameplay of their predecessors. Super Mario's Core Gameplay revolves around jump man of course, and using those methods to platform, and defeat enemies. This core gameplay does not change for years unless Mario bleeds into other genres. We can see that games try to follow core gameplay when making the next generation of Phantasy Star, or even the shooting DukeNukem.
What is LoK's core gameplay, then? It's like it was in the original, a space vixen get's fucked, and that's about it. you're allowed to add gameplay to that if wished, you're allowed to add voiced grunts, items, maps, quests, anything that would elevate that core gameplay. As long as that space vixen is getting boned, whether by tacos or sausages, the core gameplay can be improved many ways if it synergizes well.
So yeah-yeah, as long as our heroine finds herself in...sticky situations, I think it's good to go.