Our next project is to make a multiplayer game that uses one or no screens. I'm thinking of making a 2 player shooter game in GameMaker. I have a little bit of experience with GameMaker, so with the time we have I think I'll be able to create a game with a couple levels. Since the theme is "grit", I think a shooter is appropriate. The players will have to shoot all of the enemies to advance to the next level. After a couple of levels they will fight a boss. After defeating the boss the game is over.