Yes it would be possible to do it with the engine.
But it is a design choice made to save time during the jam and to immerse the player more. I wanted the player to feel like he was just sent into this computer when running the game, that he controls the virus from his computer. That is emphasized even more with the ending of the game, when you win, you have to type-in the logout command to leave the game, when you loose, the system crash, killing your virus, and then crashing the game application.
Anyway, thanks for the idea ! :)