This is a terrific puzzle app. The goal is to tilt the blocks in all directions until the chosen block falls OUT of the gate. Another fine puzzle app thats well worth the price. Consider: a movie costs $10 and you get 2 hours entertainment (assuming the movie is good). This app will last a good 20 hours. A bargain! Puzzle fans: we all need to support the puzzle writers otherwise theyll stop making puzzles. Other great puzzle apps: Lab Mice, Subway Shuffle, Colorbind, Goldmine