At least it opens again for people who aren't logged in. Can't see if the highscore table is working for those users because it doens't even work when I am logged in...

Hey, do you still have the source code for this and can upload it? I still have no idea how to use those mysterious threads and this scenario looks like an easy example.

Very interesting, my moving was not the problem as it seems. With polar coordinates nothing changes. Even the shaky movement of the obstacles, if they are in the middle, does not change.