Hi there!
Just a question from us: what would be happening in the computer/TV?
As for your second question:
Parsers are formatted differently than Choice-based/Hyperlinks type of IF, especially when it comes to code. Instead of moving from passage to passage, or screen to screen, you move from one room to another. You can break down a space (like a living room) into multiple rooms (northern part of the living room, the southern part of it, etc...)
A coded "room" in parser is similar to a "text-passage"/page on the screen in Choice-based/Hyperlinks. So the optional rule for a parser-type would be to have the whole game coded in one "passage"/screen.
I hope this clears things up!