The game sux cause it wasnt finished, duh! I really liked the SP. Too short, but fun. And the MP has never been finished, so...
And I'm going to search to that UE editor tutorial, cause then you can make your own levels, and if you got more, the game will be funnier to play, too. And I'm not THAT fun person n00b. The last problem is that JJ3 is illegal, but to edit and upload levels for the game shouldn't be illegal. The demo is just another part of the story, wich I'm not giving you via this