Rather addictive, the only major fault I could find is the fact one is not able to retrieve ores that end up in patches of forest. Either add a tool to remove trees or don't have the ores go into these patches.
The town feature could be expanded upon as it doesn't really matter if you bother with it or not.
The same goes for the changing exchange rate of gold, this should change more drastically because I ended up exchanging every single time.(Maybe add a hardcore mode?)
Being able to buy different hauling trucks would add some depth as well as having more upgrades for the truck itself. I really missed a fuel tank-upgrade even though the capacity increased every time you upgraded your engine.