This is a puzzle game being conducted by placing the rocks side by side on the game board to allow the flow to go from the start rock, the rock with the S letter, to the end rock, the rock with E letter. The start rock is where the flow starts and the end rock is where the flow ends. Each game level has time limit. The player must fulfill the level requirements before the time runs out. The level requirements include rock numbers, the required rocks as well as start and end rocks. If the player doesn't place the rocks as fast as possible, enjoy being chased by the flow. It'll be fun. FEATURES:1. 50 different levels (more to come in the future versions for free). 2. 15 different types of rocks. 3. 15 different types of required rocks. 4. 5 game board themes. 5. The implemented levels are saved, so the players could continue from last time.