I created a puzzle game with Unity and uploaded it to one server. This works fine, but I bought a new server and uploaded my game to it as well. There, the loading time is much longer.

These are the servers:

1. http://pinheadsinteractive.com/Mozzie/ (fast)
2. http://operation-mozzie-free.com/ (slow)

The Unity files are exactly the same from one server to the next.

My client is dissatisfied with the new, slow loading time. So, how can I reduce the time my Unity game takes to load?

Even in some cases they faced the problem that they could not load the game at all. For the the moment, I'm using an iframe on the new sever as a workaround, but the issue still remains unsolved.