If you're not familiar with Luxor, it features a scarab beetle pushing a line of marbles down a winding path toward a pyramid. Your mission: destroy that caravan before it reaches its goal by firing colored marbles to make a chain of three or more similarly colored orbs. Creating such a chain makes the targeted marbles disappear--and earns you bonuses and power-ups you can use to further clear the path of those venomous scarabs. As you progress, the paths get more complex and the marbles more plentiful, ramping up Luxor's challenge.
The original Luxor made great use of the iOS's touch controls. You would move your shooter back and forth with a sideways swipe; tapping the screen fired a marble. If I had one complaint about Luxor on the iPhone, though, it would be the limitations of that device's screen. Accurately lining up a shot can be a bit of a challenge on the iPhone and iPod touch, leading to the occasional misfire.
That's not an issue on the iPad's ample screen, which Luxor HD and Amun Rising HD both exploit to perfection. (Despite the different names, gameplay is the same on both iPad apps. They just offer different stages--88 levels on each game, according to MumboJumbo.) It's easy to move the shooter back and forth, change the color of your marble ammo with an upward swipe, and fire off a shot. Now when I misfire, I can only blame my lack of skill and not the limitations of the screen.
The ancient Egypt-inspired graphics, clever sound effects, and stirring music from the iPhone version make their way into Luxor's iPad efforts. I particularly like how the music becomes more epic and menacing as the marbles get too close to the pyramid for comfort, and the clang of marbles when you misfire a shot is truly heartbreaking. If you'd prefer to listen to your own tunes while blasting marbles to kingdom come, Luxor HD and Amun Rising HD will accommodate you--you will want to adjust the volume of the game's music and sound effects, though, which is easy enough to do.
Some iOS gamers balk at having to buy multiple versions of the same game for each of their mobile devices. That's not the case here--Luxor and Amun Rising may carry the "HD" moniker, but they're universal games that run on the iPhone and iPod touch as well as the iPad. In fact, iPhone 4 and fourth-generation touch owners will enjoy graphics enhanced for those devices' Retina displays. iPhone 3GS owners like myself can take comfort in the fact that either games runs perfectly well on our phones.