Hello!
If you're referring to the "Connections Sector" (a.k.a the minigame where you have to infect the nodes and defend yourself from antiviruses), you have to do the opposite of what the command line says, meaning if it tells you to "proceed/move" in a certain direction, you cannot move in that direction at all. If it tells you to "not advance" in a certain direction on the other hand, you are only permitted to move in that direction.
If it is legitimately buggy, I'm willing to fix it if you would like to provide more details! (e.g. What did you mean by 'if you fail enough times you complete the level'?)
Thanks for commenting!