I have to say, I believe the atmosphere this game produces is golden. The increase of blur (technically static) and sluggishness when the power capacity is low really gives off a feeling of weakness and lack of *power*, making it very suitable to the theme. Also the ending got me.
Still, if I had to say something negative about it, well, this one's pretty minor, really.
The Player might not understand what the functions of the switch panel and the yellow walls are if they go to the left after getting on the first elevator, especially with how the battery box lures them to go there (since, when they go back to the right later, they won't notice the difference in the wall), and if they go straight to the right, they'll get stuck if they fall down and keep going right. Since they're likely to use the recharge panel over there (they likely wouldn't want to risk falling to 0 percent, assuming they don't know anything about the path that lies ahead), once they realize that the path they were through is blocked, they will be unable to respawn, since it only moves them to the latest recharge panel they've used, and would be forced to restart the game. *Assuming* my speculation's actually correct (Not saying it really is, though), if it had to be fixed, I'd say move one of the walls by the crossroad on the path on the right, so when they return back there, they will be likely aware of the change with the wall, and will definitely prevent them from being stuck.
I apologize for hogging so much space for explaining such a minor problem, even though it's not anything truly bothersome this time, since it's only at the beginning of the game and a restart would not nullify much progress. Still, it's a great entry!