Well, to be honest. They are indeed to hard. But the major lack for me are the riddles, We not only have to discover who you meant, but also finish some very hard riddles for those people. They don't actually give any explanation for the riddles they give (just 'black hat, what am I?) and we are supposed to solve it. well, I myself don't really have a great history in riddles and I don't know most sorts of them, so it gets very hard for me. also that my english isen't great, so I have a hard time job just to understand the true meaning of what you ask.
awh, and before I forget, It is to many:P I totally agree that wishpoints aren't to be earned easily, but you have more like 4 medium quests, which lead to 4 hard quest, which lead to another hard quest which leads to another quest. I totally like the idea, but it should be or less long, or less hard.
but for the rest, your quests are true quests, and you must have put a lot of tought in creating them, and making them logical and intresting, they are most of all very nice to try..., not that I ever get far but oke:P