For the most part the EE is backwards compatible, but not forwards compatible. I.e. a module made in 1.69 will probably run in the EE, however a module made in the EE will not run in 1.69 (although there are workarounds that could fix that depending on the module). One of the major changes is that the EE uses webm as a video format instead of Bink video, so any movies will have to converted to run in the EE (VLC media player can do that conversion). You might also have issues with custom content. In particular talk tables and 2das might need to be updated.

Having typed that, I can't say for certain without actually playing through your module. If I can find some spare time between my own projects, I'll see if it works.