The Hidden Depths Multiplayer Proposal

I think my game would work well as a coop multiplayer game.  Since it's a room based top-down game, two people could play on the same screen.  I could stress teamwork with a few simple design ideas.  I would turn on "friendly fire", making it essential that each player knows what the other is doing, and not just hacking at anything that moves.  I'd double the amount of enemies to increase the difficulty.  With random weapons appearing, the most successful players would have to communicate with their friend to see who would most benefit in taking the item.  If one player just grabs all the upgrades, the second player will die quickly, meaning the first player will have to fight off twice as many enemies.  Hopefully, my game will be difficult enough, that coop would be almost impossible to beat with your partner dead.