I'm not sure what I did wrong... maybe the thread was too thick, or I shouldn't have tried to make an X on every spot, and just have made a \ or /. In any case, the case sat half finished for most of the year until my other iPhone case broke and I was forced into using it.
At least it doesn't look too bad on. I wish it was easy to just cut away the blue, but it's very difficult, and I'm not sure the case wouldn't still be stretched out underneath.
Oh well. Lesson learned. Maybe I'll try again sometime, it is pretty fun.