Ok, I´m gonna go ahead and suggest something, and is the last time I bother in here.
First of all, before you even think of making the game and/or thinking what program you´re going to use, you have to make at least some small theorization of the game. You have to think some cool ideas you´d find fun in a game (and possibly that no on else exploited) and then pick the best game genre that would represent that. Right now it just looks like you woke up and suddenly wanted to make a game.
Now, again, I STILL DON´T KNOW WHAT THIS IS ALL ABOUT. I can only get that this is a multiplayer game, but from that sketch you posted I´m guessing it´s a platformer game too? Is it something like SSB in 8bit or something? Or is this some kind of competitive game more alike to Mario, where the one who gets faster to the end wins? What the original thing of your game besides making a SSB game with megaman characters, if that´s the case? There are a lot of stuff that you SHOULD have mentioned in your first post, and you still haven´t. I´m not asking for sketches and drawings or anything of the like, that comes WAY after, what I want to hear and you should be thinking beforehand are the basics of the game.
If you get an interesting idea, and you have the skills to do at least SOMETHING for the project (coding, graphics, etc.), then the help will come by itself. I can be an ass when I want to, but I´m really trying to be helpful here.