It's a Stepmania knock-off.
Like StepMania is a Dance Dance Revolution knock-off. :D
Windows Phone 8 / vNext
C#/VB + XAML for WP Metro Apps.
C#/VB + XNA or
C++ & D3D for Windows Phone games
Windows Phone 7.5
C#/VB + XAML for Silverlight apps.
C#/VB.NET + XNA for games
Windows Surface RT
C#/VB + XAML for Metro Apps.
D3D & C++ for Metro Games
Windows Surface Pro ( use windows 8)
C#, VB, C/C++, Java, F#, Ruby, Python, JavaScript, PHP, Perl, Haskell and any other language you can use for Windows 7 dev
Windows 8 is already supported, but Windows RT is not likely to ever be. *IF* someone comes up with an "emulator" that makes standard OpenGL games run under windows RT (which might be possible I heard), than there is a faint chance that it can happen (would still need developers to actually do it though :D)
If - for example - the
ANGLE project matures, it can provide the layer of abstraction SM would need to run on RT, but due to the
lack of runtime shader compilation it could take a while (if not forever).