[DoublePlusWill]

Here's a good screenshot I got after playing for 10 minutes. This tended to happen to me about every 1-2 minutes. Either those are some incredibly synchronized humans or it's just an April fool's joke.

http://imageshack.us/photo/my-images/832/screenshot20120401a...

[i_cannot_hack]

You are right, this is not multiplayer.

How I know? I turned off my internet connection, and the game continued to work .

[abend]

Same thing happened to me.