Quality being held back.
My initial reaction was excitement, a game with some cool fresh gameplay ideas, and a story that commits to itself to the point of justifying in game death with the use of time manipulation and all that.
I still really dig that, I think you have a very solid, well polished game here. The graphics, every piece of the game from saving, to starting over, to any button you push having a reason in the story as well.
The more I saw of the story the more I felt "Eh, this is the basic portal plot." And then I realized how many parallels can be drawn between this and portal. Gameplay, story, art, all of it. That made me sad.
You CLEARLY are very talented to make such a well defined game, with precise decisions to create the tone you wanted, better than any other portal inspired games I've played. However, I know you can one up yourself here. It's like I feel all this creativity under the surface being held back by an idea we've already seen done really really well.
The game works, and it's good, I really, really look forward to seeing more from you in the future though. Your past work proves that you've got the innovation, and like I said, there was a lot of enjoyment to be had from this, both with the exact tone, the fun gameplay, and the uniquely challenging puzzles.
I hope I don't come off as a jerk by saying this, because I truly appreciate the creativity that went with this, but I did I feel I had to say that I sensed some unused potential here.
If something doesn't make sense, feel free to PM me, and I'll try to clarify,
Thanks!
Iantherage