Even if it was remotely logical to have a strictly multiplayer-only game, the multiplayer itself on this game lacks everything. Again, all the levels fit on screen, whatever excuse you have doesn't matter these major flaws still apply. Thegame play still has no variety, all the characters are the same - I seriously shouldn't have to repeat myself. Whether it's a multiplayer game or not, you are missing the point. Nintendo and sSega never made to my knowledge a single successful or well known game that is multiplayer-only. Even games like super Splash Bros and Mario party have a single player mode. This is the basics, something elementary game development. There is no requirement for indie games to be made of crap I don't know why so many people seem to have this mentality. It's not that have to be crap it's that they often are by developers choice to not put in any effort.
Street Fighter, Smash Brothers, Columns, Magical Drop, Pacman VS, Sportsfriends, Borderlands, Endless Forest, and all MMOs confirmed for bad game design.
What's elementary, sir are board and field games. The root of all games is multiplayer.