......huh...
So.... does the title refer to Jack's fixation on Kathryn?
I didn't notice the subtitle, so I didn't realize it was a prequel for The Company of Myself until I read some of the reviews about halfway through the game. (goes to show, you can't trust people you meet suddenly in the sewers)
So, yeah, I thought this was a really cool game. A solid puzzle-platformer with a good art style and great music. The smoke and dust effects were fantastic.
Most of all, I thought it was an excellent evolution of the previous game. I thought that The Company of Myself felt like a really interesting experiment, and I feel like Fixation goes beyond being an experiment. You did a lot more, and more interesting things with the idea of level design as metaphor and character development; enough that I actually want to go back through the game and really pick at what you were getting at in some of the levels. The AI controlled co-op is a really cool idea, and I think it does a really good job of getting across the idea of doing things together with people. I thought it was especially strong when you had that awkward uncomfortable moment where Thomas shows up and helps you through a level, and then you contrast that with Jack.
To me, a lot of puzzle platformers feel just like taking a stroll and mulling over my thoughts, so I really enjoy the sort of every-day meandering thoughts tone that you gave to this.
The story felt a little disjointed at times, and I think you should have done something to better get across the passage of time (although at certain points it seemed like confusion over time might be what you were going for?). The character development felt a little weak in some places (and the character introductions all felt a bit too blunt except for Thomas), but at the same time, there were places where you did cool and interesting things with it. In particular I think you could have done just a little more to get across Jack's mental instability.
I think my biggest criticism is that I didn't quite feel the connection with Henry. The way the levels were set up it felt kinda like there had just been one extended conversation with him. I think I would have mixed up the levels a bit more. Introduce the "worlds" as different concepts, then throw in the different kinds of levels where they make sense. So maybe you have a few levels with Henry where you're chatting, and then a level at the house with Penelope and Thomas where yo use things you learned with Henry, followed by a level in the sewers. Then the next time we see Henry we're talking about and reflecting on something that just happened (and maybe we find a better solution to one of the puzzles we just faced), and you get more of a feeling like Kathryn has been seeing him for some time and their conversations are integrated with the rest of her life.
So... yeah, I guess that's the main suggestion I have. You have these "worlds" defined by a certain mood, bundled up all together all at once. You should mix the levels more and let the changing of the moods and mindsets from level to level tell more of the story.
Great stuff! I hope to see you guys do more stuff like this.