Complete the forest castle.

Complete Chapter 6 - 2 on any difficulty setting.

A vehicle flew at least 5 grid units into the air.

Completed all optional levels.

Ran a level simulation although not one single element had been built.

Cars can drive on all of Island 4's bridges.

Trucks can drive on all of Island 2's bridges.

Bridge completed although at least 1 part broke.

One vehicle reached the opposite side of the bridge safely, the other did not.

Built a bridge which can support trucks for 25,000 less than specified.

Built a bridge which can support trucks for 15,000 less than specified.

Cars can drive on all of Island 2's bridges.