The plot of Constructor Sim is based on some different types of missions where you should drive the truck to a location with an excavator.
If you’re done with all building, it’s time to test drive your simulator. Choose between a few simulations, that you can run on your rig and see for yourself if your build is behaving exactly as you planned, or needs an extra tweak in some areas. You can always go back to the workshop!
Get the best price for your build, put it on an auction and sell it, or exchange it for a rare vehicle. You can also make use of any of the parts left from the original vehicle such as engines, seats, body elements, and sell them.
The point of the game is:
1) to deliver the goods to a place where the construction is located.
2) to control the excavator
3) delivery of the goods to the main location

Try to level up your skills in Constructor Sim!