The original XNA codebase has been successfully ported into the MonoGame framework and is functioning in the Windows 8 Phone environment.
Currently the game runs fine in emulation mode and on an old Lumia 810 but work still needs to be done on rescaling some of the graphics for the smaller form factor and also dealing with framerate issues on one of the maps. For the immediate future I plan on completing the game on the Windows platform and then doing a second port to Android.
Emulator Screenshot: