Board Thread:General Discussion/@comment-202.150.1.24-20130831153056/@comment-3153244-20130908042755

Please note that it's not as easy as you think to buy those upgrades. Each upgrade has to be unlocked separately with cash that your city earns, progressively costing more.

Also, it's not as hard as you think to pop bloons. Some guy managed to pop the DDT, but he hasn't said anything about what was inside, only that it was "expected".