I've at least tried all quest, except Twilight_Knight's quest because the link doesn't work.
EddyTheOlivera: I really liked this one
. Though, there sure was a lot of text at the end. And no, I've never played a Phoenix Wright game either, so I can't say anything about that.
Avataro: No ending?
. Just a black screen with a creepy wave sound or something in the background. Other than that, I liked this one too. Really cool with the pixellated tiles. Oh, and: "Oh look, a tile error!" LOL
Moosh and Russ: I'm playing through this one and I'm still only at level 1. It seems to be the longest out of all these quests. I really like it though so far. It seems very well done, and uses some cool scripts(and you've even said there's like 5000 lines of code!). Also some random guy said the name I chose("Link") was stupid so he named me "Finnigan" instead HAHA.
Lejes: Awesome! I can kill everything by just touching people. Ganon is no match for the mighty Killer Frisbee! 
Twilight_Knight: Sorry, but the link isn't working, so I can't try this quest...
Geoffrey: Hahaha! Thomas the train! Anyway, don't get fooled by the theme here... I couldn't beat it lol. I think it's really short though, but I will never know...
Astromeow: Eh, I didn't get very far at all in this. I might try it again sometime, but since there's no save(you even have to watch the intro over and over again), and I just found the whole quest a little strange... Doesn't mean it's bad or anything, I just don't think it's for me. I wonder though, were you inspired by Earthbound when making this? It looked kind of similar to the indoor sections of Earthbound, and I wonder, were some of the sounds even directly from that game? Sorry, if I'm completely off here.
Anyway, seems pretty much all of these quests/games had a lot of humor in them, and they were all pretty cool and unique
.