Summary
No good, no fun.
The Good
Not much. The engine is basically the same as Duke3D so it's graphically OK and quite fast, but they somehow mananged to reduce the graphic quality by a large margin. The character itself is also quite cool at first, but it's easy to get bored.
The Bad
A crappy selection of weapons (see: Trivia) and bad overall gameplay, no fun at all.
The graphics are somehow not nearly as appealing as Duke3D's and the engine looks somewhat choppy.
The game in itself is completely idiotic.
The Bottom Line
A really bad "first person shooter" (though it can't really be called such).