I thought that green block filling up was a really nice playful touch. Letting us get closer to the game during a loading screen with an in game element gave me some positive anticipation for when the load would finish.
The green block filling up is all I ever got. It consistently stalls at about 50% for me.
:(
What browser/OS?
Chrome 27.0.1453.93 on OS X 10.8.3.
That's quite weird. It would be really awesome if you could open your developer console when this happens (cmd + alt + j) and then copy what it says and send it to bugs@skycraft.io :)