I can relate, heh. The first day I got the game, two of my friends and I played, and one of them was a constant griefer. Funny as hell at times, but it did noticeably up the difficulty in comparison to single player.I sure did my fair share of dying when playing in 2 player thanks to our wonderful ability to kill each other in hilarious ways, though X_X
@Bigboi: The later worlds do get harder, but don't expect to game over soon if you're good at getting lives. Honestly, if you're looking for a challenge, play with an asshole.