Somehow I did it. Whew, what a finish.
After the first day offline and most of the second day working on wrong concept, I managed to pull myself together and make a game in the last 8.5 hours.
You are building yourself a pyramid. Try to get same symbols together and upgrade your stone mines with the money earned.

Where's the theme? Good question! Life as currency = slavery, slavery = building pyramids.
Now I have just over an hour left for at least a passable game page and I call another Ludum Dare a success for me. But I gotta say it was a close one this time.