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Pretty sure it's sixty levels, as the App Store description says there are "180 handcrafted goals" and each level has 3 goals. I'm currently on...
There is a seperate thread for that: http://forums.toucharcade.com/showthread.php?t=123434 You will find plenty of neighbors there. :)
The game was updated via the in-game mechanism and now goes to level 21. There you can build the Muntz' house and get Nelson with it. Also another...
Same here, already researched everything and maxed out the building completely - all within my first day of playing. The game is very very very...