In 3 buildings, it has dead bodies with messages that reveal what happened. The first talks about a delivery to the second special now-dead person, who says a disease tested performed better than expected, and leads to the third person. His message says that it went completely out of control. This doesn't help you find your daughter, but it is interesting to read.
My only complaint is no quality setting. If you have a couple lag spikes where you can't change direction, it makes easy levels hard and hard levels impossible. In fact, the whole game becomes you restarting a level until enough of the lag comes in straightaways so you don't constantly crash.
If you try playing on a slow computer, every bomb kills you before you can move far enough away, and it is impossible to run past the stompers before they crush you.
Usually my low-end computer can't process 3D graphics like this, but it can for this game, even at full visuals and effects without any lag or issue. It helps me appreciate the time went in to creating the impact designs, acid spray corrosion on the missiles' shields, the thunder cannon's paralysis effect, and even the blue glow of every plasma bolt. The amount of time that must have went into designing this game is astounding!
It's so annoying when there's a wall of 3 blimps that prevents you from continuing unless you're invincible. Could you limit the amount of these and the giant planes on-screen at one time?