Mobigame has turned out a real gem with Cross Fingers, a simple yet addicting tangram puzzle game.
Each of the 120 puzzles is played on a wooden-style board, sometimes shaped like an open square, sometimes with more diabolical patterns. Two different kinds of tiles need to be rearranged into a particular shape within the confines of this board. Beige tiles simply slide and stay and place, while orange tiles slide and snap back to their original location.
It takes some careful manipulation (and some tricky finger movements) to get the tiles their destination. Like Rush Hour and similar object puzzles, this one starts simple and gets progressively more challenging.
Two versions are available: Cross Fingers Free (free) with a limited selection of puzzles, and Cross Fingers ($1) with all of the puzzles plus an additional Tetris-style game mode after you’ve completed them all.