I just played it. The first betas you released made me feel it wouldn't live up to its brother. But hell, this new version proved me totally worng. The narrative is slightly tighter this time, with great results. You can feel a sort of story being told, and yet still feel trapped in this foreign world full of horrors and undesirable surprises.
I hope that if tehre is ever a third iteration in the "series" the narrative still gets stronger. Can't wait for it...
I'm flattered that despite your beta-impression you still gave the final copy a try. This isn't a very technologically advanced game, and it's originality or style can be debated till the sun goes down and up again.
I didn't get into doing this to shift paradigms or revolutionize anything. I see game technology as a 'framework' to erect a story, idea, or mood around. That's not to say framework is any less important than any other aspect of the product, it's just not where my expertise lies.
It could be debated that Quake3 Arena was little more than an elaborate tech-demo, but regardless of it's depth, originality or substance, it remains one of my favorite games of all time.
Wow, I'm sorry, I went on a tangent there.
To address the question of a "sequel", it's not out of the question, but it's not on the table. I'm very happy that I've made two rather fun platformers, but I'm ready to see what else I can do. I think I can be more than "That scary platformer-game guy" and I'd like to see if it's possible.

stay tuned. When I'm ready to show what I'm working on next, it'll be in a brand-new thread