Thanks, Levelpack works.
One Problem is still there, though.
The first level comes now after the 10th.
The second level after the 20th and so on.
Level 1 - 9 should be named Level 01 - 09.


edit: I think a cool feature would be multi levelpack support.
So everyone can build their levelpacks and submit them to the Mokomaze site and then everyone can play these level without having to rename the old levelpack file.
Of course these Levelpacks have to be in the same resolution.