Cool. I think your game is on the right path.
Here are some thought I have when I play the game.
Most of the questions ae already rise by corpsinhere. I only have few thought about the control.
The instructions need to expain how right click unselect the truck action. So that we won't be lock from brewing beer.
Mean while, I think left click the selected icon to unselect the action would be a more common intuitive control.