The iTunes App Store is, without a doubt, full of puzzle games. Some are looking to jump on the bandwagon of Tetris copycats, while others present a match-three style. All attempt to challenge the iPhone gamer. We want to give you a glance into five new iPhone puzzlers competing to grace your screen.

Cross Fingers, by Mobigames, introduces gameplay where players must refit wooden shapes into preset slots. There are two types of shapes, light wood and red wood that must be dealt with. While light wood pieces slide and stay in place, red pieces must be held in place as other pieces are arranged around them. If players let go prematurely, the red shapes will return to their previous location. This clever feature grants Cross Fingers its name. Fingers must be twisted in order to hold the red piece in place while other shapes are reordered to solve the puzzle.

Bringing a bit of a physics theme to the table, Pocketball is a puzzle game that is built on the Box2D engine. The goal in this game is to guide balls into specific pockets in each board. Influenced by gravity, balls are drop from above and must be aimed around the board by ropes. Players draw ropes between pegs to bounce balls in a sort of geometric maze. As the puzzles progress, obstacles are introduced that complicate things. Bombs will destroy balls outright, while gravity wells pull balls toward oblivion. Arrows can work for or against players as they push balls around the screen when touched.

Implode, by IUGO Mobile Entertainment, is a puzzle game that contains 60 levels of buildings just waiting to be destroyed. Presented in a chalkboard fashion, buildings are arranged with only their support beams showing. Players must destroy the building in each level by using dynamite or blast bombs. Of course, it is harder than it seems for there is a horizontal dotted line that the resulting rubble must reside below. In the end, a letter grade is awarded according to Explosion Points, Height Bonus, a Difficulty Bonus, and an Unused Bomb Bonus. A total payout it given in each level determined by these bonuses. Obtaining an A+ grade is super difficult and will require a lot of time tinkering with bomb placement. As Implode progresses, difficulty ensues as no-bomb-placement beams are introduced.

Monumental, the latest in a series of puzzles by Dr. Knizia, brings the Mayan world to the iPhone screen. Arranged in a pair of 3 x 4 grids, rectangular stones must be shuttled either left or right into the grids. Every stone sports a certain color and number of symbols on its face. Players must fill rows within each grid by grouping stones according to color or symbol, or hopefully a combination of both. For example, you would like to have three stones that are all the same color and have the same number of symbols on their faces. A combination like this would return a great score for matched colors, symbols, and number of symbols. Unfortunately, a case like this is rare to stumble upon. If a player combines stones with the same symbols in a row, regardless of the color or number of symbols, these qualify for symbol matches and award points. An identical pair of stones in a row also scores points, regardless of what's on the third stone. Watch out for broken stones without symbols, as these can only be matched by their color.

Wordigo is a unique word puzzle game for sale on the App Store by RiverEdge Game Company. Combining creative word development and a fierce seven minute time limit, Wordigo aims to be the word game players will keep coming back to. Unlike other word building games, Wordigo prescribes where you can create certain words and limits each game with a strict descending seven minute clock. Eight puzzle boards are offered, each designed with horizontal and vertical paths for words. Think of a partial cross-word puzzle with several word paths and empty areas. The goal is to construct words using randomly generated letter tiles. Players can only move on to a new path once the previous path is complete. Scoring is based on clever vowel placement.

These iPhone puzzle games are just five of our top picks. We feel that if you decide to purchase one or all of them, you'll enjoy the rich gameplay experience each offers. Each sports unique characteristics that set them apart from the flood of puzzle games in the App Store.