Sadly a lot of people are reporting that Alpha 1.5 does not want to load their old worlds. I don’t know why this might be, all 3 worlds I have on my retail phone converted OK. Also all the tests I did before the release worked fine. Worse, some people are not able to create any new worlds without uninstall/reinstall of the game, which will delete their old worlds for good.
I feel so bad about it, sorry guys I screwed up :-(
We really need some backup functionality. If only this was a PC you could just copy the files, like in Minecraft, but on WP7 this is much more complicated. There’s nowhere the files can be copied on the phone itself (media library is one place but it only accepts jpgs and movies). Even Skydrive doesn’t accept arbitrary files. I will probably have to look into using dropbox.