You mention skill levels and that made me think of a question. I've been looking for something to play with my nephew. Does it have player and enemy levels as well? The problem I've run into with those PVE games is that if one plays without the other for any length of time, now they are way more advanced and it ruins the whole playing together thing because one player either doesn't contribute at all or is just a hassle to keep from being one-shotted by everything.