I admire your ability to not take your work too seriously. A halo clone is certainly an ambitious project but you're going about it the right way.
I'm downloading it right now, but a little extra media might be nice.
I have to say that it seems a little strange that you'd have a three player splitscreen mode and not a four player mode already. You should try to lay down that sort of infrastructure right from the start I think.
By the way: I suggest you don't bother with network play. At all. It's a fun idea but it will be a tremendous amount of work and in all honesty no one will ever play. I think the game is fine as a splitscreen multiplayer game.
![laugh laugh](/ubb7/images/graemlins/default_dark/laugh.gif)
Anyway I'll let you know what I think of the game shortly.