I'm making a 2D platform game. This games is basically this:

Two players shooting each other (Multiplayer game, the two players using the same keyboard). There are weapons, items, etc.. for making it more fun.

My question is: Would it be better to use a divided screen (Player1/Player2)? or would it be better to use a whole screen?

If I use a divided screen, my scenarios could be bigger and could have more stuff. But it would be harder to make.

If I use the none divided screen, then it would be a piece of cake to make, but hte scenario would be to short. And with a short scenario the game will be "kill or survive" (which means no choice of escaping the battle to get better weapons, and items).

Any suggestion will be very usefull!