Getting the gravity script working is insane... Did that for one of my projects and it took days to get right.... nice work!

One idea for the objects that weren't facing the correct direction:

You can create a script that can attach to any of the components that spawn on the service. In the Start() function you can then calculate the direction between this object and the planet's center, so transform.position - planet.transform.position (could be the other way around) and then set this direction as the up vector of the object. That way your object will always point up :)