I thought this was a very witty and entertaining game. Some of the dialogue was so darkly humorous it made me break out in fits of geeky laughter, and I thought your style of writing created a strong mood for the game. The way the narrative was told in short, choppy sentences that were only seen one at a time said a lot about Marsh's terse, childish nature (at least that's how he came across to me).
If there is one comlaint to be had with the actual writing, then it would be the inconsistency in tense. It would start out in present tense, and then suddenly, sometimes even in the middle of a sentence, it'd switch to past tense and then back to present again, which for me severely hindered the impact of the story. I know that this was made in 72 hours and you were probably so busy with all the different storylines and drawings and progams that you didn't have time to check for errors in the writing, but the narrative is the main component of this game and I feel that accuracy in grammar and style should have been near the top of your list.
I think it was a nice idea to make this interactive and have multiple endings. I liked all of the funny-not-serious-in-any-way endings (the radioactive chciken still brings tears to my eyes), but my favorite was the true ending. Not only did it have some of the funniest lines in the whole game (I swear every time I'm goign to think of a Smurf for the next week I'm going to burst out laughing), it also left a lot of interesting and very,very...odd questions. Was everything up to the people chained to the wall a halucination? If another version of him was running around, how'd it get there? Where'd it come from? Another Universe? Did it really escape his mind? How could Marsh be that crazy in the head to have some evil demon crawl out of his ears without him noticing? Or was that guy just a crazy freako who thought he was Marsh's doppelganger but really wasn't? Was anyting accomplished by Marsh's imprmptu sucicie? Although the ending was really funny and witty, I feel like there were just too many questions left hanging to be a satisfying "true" ending. It tried half-heartedly to be serious but just ended up being too comical to be taken seriously. Maybe next time you make a game you can try for a more consistent mood at the end and something that still satifys at least some of the player's questions.
All-in-all, this is a really great game for something made in 72 hours. The story was funny, clever, interesting, and well-developed. The writing conveyed a strong tone and mood. The dialague was funny as heck and the endings were witty as well. It was a cute and darkly witty way to pass the time. Keep on making and improving :)