You can (and should) buy various upgrades to beat hard levels (like DDOS level).
DATAFLOW Steam CD Key But this isn't so easy, because your system could become overloaded or infected.. Control the network dataflow! Pass data packets, catch e-mails and bonuses, destroy spam and viruses! Show the full skill of your reaction to take first places in the on-line highscore table! Features 12 levels of increasin. Earn points and buy upgrades! Your task is to pass as many data packets as possible and to destroy all viruses.