Interesting concept - reminds me of some old games that I used to enjoy playing on the PC.
Feedback:
1. I know the goal is to collect $X but there could be some more instructions in the game i.e I click play and start seeing heaps of people walking a road thinking what are they doing. Possibly the game should start with "Build Your First Truck By Clicking" or similar.
2. It would be great for their to be a timer for how long each day goes and how long each day lasts.
3. Would be good to see a high score system in place.
4. With the buying and selling of trucks it would be good to list the sell price loss i.e 50% so that people are aware of this.
5. Additional upgrades and adjustments could make this game really good.