mooSphere is designed to work on the 1.11 version of mooTools and is not currently compatible with the 1.2 beta versions. Either before or shortly after the stable release of 1.2 (depending on how much time I have), this project will be moving to the new design of mooTools 1.2. The last 1.11 compatible version will continue be available for download, but I will not be supporting it.
Note: I have been taking a break from development on this project as I have had to spend some time with personal issues. Development will resume (with a new major version release shortly thereafter). Thank you for your patience and enjoy the tool in the meantime.