Fun game. I really like how our understanding of the future is slowly built across the various endings. Reminds me a bit of the text adventure "Slouching Towards Bedlam".
Also, some of the endings remind me a lot of the movie the 13th Floor. (SPOILER WARNING FOR BOTH) Specifically in that both involve AI simulation inhabitants rewriting the brain of a visitor to the simulation.
This is a great game. It manages to introduce a number of different simple concepts gradually building up into some really complex puzzles. My one pet peeve is that it's a little too forgiving: Unlike some of the other programming/assembly line games, it doesn't fail you for breaking tiles or submitting incorrectly produced tiles. So rather than getting the timing correct, you can pass a level with any design that gets five correct tiles on the goal at some point in its operation regardless of how many bad or broken tiles it also produces. Still, I certainly wouldn't penalize a great game like this for an issue like that. A definite 5/5 in my book.
My favorite part are all the humorous messages when you try and use the wrong object on something. Those little touches really add to an already great game.
The change with having enemies stop closer to the edge is awful. It almost guarantees that you'll get shot point-blank while trying to get them killed now. Making such a change right in the middle of the challenge is exceedingly lame. Rated the game 1 in extreme disgust.
Not a bad game, but the save wipe was a total deal breaker. I'd already wasted an hour or two completing all the missions and challenges only to find out that I'll have to replay them all to get badges. While the game is kinda fun, replayability is limited. Just replaying through enough missions to unlock challenges so I could complete Kongregate's card challenge was enough to sour me on the game and sink my opinion from "decent" to "awful".