Need opening this game

Need to play 20 minutes

Click "Start game"

Let's start to play again after a loss

You need to remove 10 viruses from a computer in one attempt.

You need to remove 20 viruses from a computer in one attempt.

You need to remove 30 viruses from a computer in one attempt.

You need to remove 40 viruses from a computer in one attempt.

You need to remove 50 viruses from a computer in one attempt.

Missed 3 viruses from a computers in one attempt.

Infected with a virus "Petya"