Hi Starfighter, please post further questions in the new guidelines thread.
1. System games are games with thorough rule systems in place to prevent power-gaming. Freeform games are systemless or contain systems that don't sufficiently limit power-gaming.
2. If the quality of writing is good, you'll likely be fine. However, if the core concept of the story is that it's extremely 'random', and plotless, and without good characterization or branching, then it better be exceedingly funny.