|I remember this was a pc game on a disc that i had lent from the library (yes that was possible at that time).|
It's a game about a girl (possibly a princess?) that gets lost i think in a strange world and gets help from these creepy looking (nightmare before christmas, tim burton style) kids and i think there was a level with a big snake but im not sure. I do know that it was some sort of quest she had to follow to get something back or get back, I don't remember.
I just vividly remember those creepy kids that didn't want to help her but they ended up helping her anyways. They were little kids with creepy masks on and they had a tree house or something like that.