The game is really nice but we have a problem, the game don't want us to have separate controllers, we are forced to share our controllers. It's okay but it's unconfortable :/
Glad you're enjoying it :) You can use separate controllers if you want. Just plug in 2, 3 or 4 control pads and use them individually as normal. You can also have two people on keyboard, one person uses WASD and the other person uses arrow keys.