Actually i can tell you why....
When i made the game, after making a level it sends the level data as a variable to another flash movie to test the level.... due to limitations in URL lengths... the level data can only be a certain length else it wont send the data.
I advise to keep levels smaller..
The limit is around 30-40....
Use only 30-40 blocks no more (count things that use waypoints ie. guards as 3 blocks)
Before you publish your level... make sure it is in these limits.
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