Riverflow

A simple yet elegant one-stroke puzzle game.In this game you need to make the river flow through all the dry and barren blocks of soil. Once the river flows through, it will turn into a green block of grass. If you successfully make every blocks turn to green, you win the level! However, every block should only be passed once. You should carefully use your intelligence to let the RIVER FLOW!

The game contains 5 tiers of levels, in each tier it has 125 levels with unique solution.