Mobile Eggbert is the planned game created from the decompiled C# source code of Speedy Blupi for Windows Phone.
Probably the C# decompiler named ILSpy will be used to get back the C# source code. See: Category:C Sharp decompilers
An alternative of XNA Game Framework is planned to be used too.
The main reason for the existence of the Mobile Eggbert project is the fact, that Windows Phone is a discontinued mobile operating system (developed by Microsoft Mobile for smart phones), devices with Windows Phones are no more produced and without such device the only way to run this version of Speedy Blupi is the emulator, which is uncertain to work in the future, as it is a closed-source proprietary technology.
Current status: No work has started yet on "Mobile Eggbert".