TapDisc for iOS combines a unique and challenging mixture of timing, strategy, and unique gameplay to create an interesting and fun new style of touch-screen game.
The more innovative games on the iOS platform tend to take advantage of the more notable properties of a touch-screen interface. TapDisc attempts to do the same with a stylized "tap-to-save" gameplay that creates a pretty interesting and addicting game environment--if you're patient enough to learn it.
TapDisc requires its players to "save" floating discs as they bounce around the screen attempting to avoid harm-inflicting orbs along the way. Discs change colors signifying how long the saving sphere (where the user touches) must be on screen to save the disc.
If you're not, that's OK. It took me a few tries to figure out what was going on. The included tutorials try to explain, but the best way to learn might be just to play the kids level--Preschool. That will give you a good sense for the timing of the disc placements and the general gameplay structure.
Challenges and variations on discs arise as you move through levels, which keeps the game pretty fresh for a long time. TapDisc also takes advantage of the OpenFeint network, keeping track of a global leaderboard, achievements, and who's playing.
Overall TapDisc benefits from being a unique and challenging game for iOS. The graphics are fun, and the back story even makes sense--think bubbly Star Wars characters fighting a giant radiation ring. The downside, though, is TapDisc suffers from having a new style of gameplay. Users looking to get into a game quickly could lose interest if they don't pick up on the concept right away.
I'm keeping TapDisc on board, though. It's a good change from some of the more mindless touch games available for iPhones, iPod Touches, and iPads. You can check out TapDisc on the App Store for 99 cents.