Liking it less and less for one main reason - no auto-pause when you leave the screen (which seems to happen way more in this game than in others). This is a pretty much a standard feature in arcade/shooter/action games!
I feel that this game suffers from a problem that many other puzzle games have. It starts off fun, then starts adding un-fun "challenge" elements (like the one-way and color-specific gates). These kinds of elements always feel artificial to me and end up ruining a good number of puzzle games, just like this one. IMO, the mark of a great puzzle game is staying simple while increasing the challenge, not the addition of extra obstacles and absurd complexity to make the game harder.
@SolstaceWinters: They increase the speed of all packets being transmitted throughout the network. So, you can build them anywhere and they help, as long as they're connected to Odin City by the network.