Neat spin on this one (nothing new though, it came out in 2003, but I only just now ran across it), as the mazes are a lot bigger, there's added music, along with some kind of warp feature thingy (I didn't use it much) added along with being able to shoot. Plus the computer warrior will retaliate if you shoot it, even by accident! But I just avoided him and didn't have any problems.
I think it gets a bit tedious when you're alone in the big mazes, but others might appreciate it a bit more.
Download the file here. You can see a screenshot here under the May 10 entry.