The game is called Pharaoh's Way and I just love it! You have multiple worlds, and every world has an uniqe set of slot machines. You can enter a "double or nothing" short game for every win you get. If you're out of coins, don't worry, because you will receive free slots after few hours. This game is great for any fan of slot machines and for anyone who wants to kill some time on their iPhone. The game is Addictive.
Search for Pharaoh's way in iTunes store.
Check Top 10 iPhone Apps in 2012