I bought this on a whim, loved the sprite work, but honestly thought I might play for an hour or so and get bored. Somehow I turned this game on and lost five hours. Insanely addictive, wholly absorbing, probably the most fun I've had with a game on my phone in a while.
Still, the game could use a little more depth and maybe more random occurrences, or maybe levels of difficulty. For what it is, however, it's pretty stellar. I just feel it could be so much more. Totally worth the $4 and change I spent.
If you're thinking about buying listen to what someone on the Market commented, "Clear your schedule." You may have to, if you can put your phone down long enough to do that, that is.
I forgot to mention, this game is NOT for everyone. You must have a love for strategic simulation games, and some interest in game development doesn't hurt. Also, if you got some love for old school sprite work, you are gonna love this game for the art alone.