there is now a test/demo suite inside the CVS repository, to check it out, use the "testsuite" module (without quotes) to get hold of the latest source code.
it's going to change a lot over the next couple of weeks, as things get moved around and a nice structure starts to appear to accommodate all the projects which are built
Zargadia is an application written using FusionEngine and is a simple space invaders game, it is a few years old now, like the engine, but it's a good test app for the 2D capabilities of the game, showing music, input, 2d graphics (using OpenGL)
the CVS now contains a module called Zargadia, of course, it's the src to the game, which can be compiled, the src is of course setup for compilation with VC++ 7.0 (VS.NET 2003) and I'll support other environments when I get time to support other environments. Right now, vc 7.0 is the only one I support right now.