After some feedback and review, it seems that v0.7 save files are NOT compatible with v0.8. There are some differences in how the new version handles inputs that prevents player movement upon loading a save file from the older version.
While this is fixable with a small patch, there are other issues with compatibility as well. Certain weapons and armors will not function correctly, and some areas may not load properly. For these reasons, please do not use v0.7 save files with v0.8. Either start a new file, or continue using v0.7 if you still have it downloaded.
Apologies for the inconvenience. I will take steps in later releases to ensure greater backwards compatibility.