I'm sorry but the AI experiment isn't working. It's just not up to producing quality new levels yet. Some human input is required. New levels (levels 18,000 +) are reduced to just one new element plus a load of blockers. Levels 6000-9000 are so much more complex and enjoyable, because they were written by human designers.
Also I include the rewrites of level difficulty (meaning the occurrence of a lucky board and outcome of the level as decided by the algorithm) need to be reviewed by humans. The AI is making them too predictable and the mechanisms are too obvious now.