Diggers

Hints:
———
If you are impatiently looking for treasures you shouldn’t
continuesly drilling into the deep.
Be careful using bridges. Next to crossing rivers you can
also jump higher using them.
Don’t waste your breath trying to drill through rocks.
You better remove them by using some heavy explosives.
But be careful as water might get into your passage.
Killing your enemies might remove them but it won’t help
you getting far as the bank calculates in money not in dead
bodies. Therefore you should prefer digging for treasures
instead.
Make sure you save the game every time after finishing a zone.
Sell your treasures immediately to avoid it getting stolen.