XBill - nostalgia

Once in my childhood, I funly clicked on little Billy, not yet understanding what an operating system is, viruses, and who Bill Gates is. But the fear of turning computers into toasters forced to act decisively. No dwarf should get to the computer!

And so, I installed Ubuntu 7.04 the other day, set up the Internet and other trifles, and decided to recall my childhood. A toy with the simple name xbill was found in the package manager and after a couple of minutes I was enjoying the murder of the innocent of spreading the vicious virus of the little eyed little men.
Background:
Something is wrong. You are a sysadmin and someone is trying to destroy your computers. Little men run around the screen and infect PCs with the terrible Wingdows (tm) virus, similar to the well-known operating system. Once the virus is installed, the dwarf grabs your OS and tries to escape the screen. So that life does not seem like honey, some computers are connected to the network and the virus immediately spreads between them. The task is to click the mouse as soon as possible, protecting the computers from the distributors of the virus, otherwise they will all turn into toasters.

The game is distributed absolutely freely, there are links to versions for various OS on the official site - xbill.org
Thank you comrade. norguhtar for reminding the name.