Very nice puzzle game
I do not normally like puzzle games. But this one was just about perfect, so I've just got to review it.
Now, what normally makes me hate a puzzle game is that I will stroll along through the levels, feeling clever and getting through them with little difficulty and then I get slammed with some stupid level that either takes me hours to beat and then is not satisfactory or I give up and look up how to do it and it was either an incredibly unintuitive solution that I would have never thought up or just a stupid thing that I feel stupid for missing.
This game is different.
Impasse has basically the best difficulty curve I've ever seen in a puzzle game. It introduces concepts, sends the player through interesting uses of these concepts, and when the player has proven that he mastered them it introduces a new one. The game gets increasingly complex but never too much, and it never suddenly jumps up in difficulty, nor are the puzzle solutions that unintuitive. In fact, I'd say this is a perfect game for humans, rather than robots, to play. It frickin' preys on human intuition.
Another thing I like is how it "teaches" the player how to play, not with a tutorial, but by presenting situations in which the player simply learns by a simple form of the scientific method ("what happens when I... ohhh"). This is the best kind of tutorial: the kind you don't even know is there.
Best of all is the primary mechanic. The arena's actors move when you do. It's not some arbitrary gimmick, no, like all good puzzle games it is a totally interesting and fluid mechanic. I don't know if you could expand upon it, but I think this game was just about the right length.
Oh and as far as constructive criticism goes? Um, I guess you could say it was bland. I sure didn't expect much out of a 125kb game. Maybe spruce it up? I don't know if that's your style then stick with it I guess.
So anyway, good job.