doesn't sound bad :)
the only this i don't like about this is that it's pretty much a loop throughout the whole song. i can tell when there's a different pattern--but of course if this is for a game, it has to be repetitive. still, it gets annoying by the time it plays over. i was going to say the end is too abrupt, compared to the rest of the song since its all ambient and sort of echoey, but since it loops, then it fits well.
i think maybe you could add just little more sound throughout the song, make it a little more fluffy :D
other than that, this is good. you used fl right?