The concept is great, but took me 3 levels to realize I could extract oil from the sand. I also think the character moves fast enough on foot to be equivalent with the average speed of the car+time stopped to drill.
Some fine tunning that would make the mechanics synergize more:
- Car moves faster on the road, encouraging the player to stay on it
- Character on foot moves much slower, he'll also be near the sand anyways. would also encourange the player to use it
And I really disliked the camera following the mouse, didn't find much sense in that :/