Mario Musketeers gives you the option to play a 1 player or 2 player game. Either way, your objective is the same. You must shoot all the enemies on each level to beat it. Keep an eye on your ammo though because it is limited. Cases of ammo will fall throughout the level so grab those to reload your guns.
How to play:
Mario: SD: Move - W: Jump - S: Shoot
Princess: L/R Arrow: Move - Up Arrow: Jump - Down Arrow: Shoot.
How To Play Flash Games