A world of pipes, and you need to make sure those pipes are rotated the correct way.
This is a really excellent little puzzle game! The screen is full of pipe pieces, and all you have to do is click them to rotate them, so that the flow passes through as many gems as possible and gets to the exit.
Click the pipes to rotate them. Collect jewels to unlock more levels, and collect all the jewels in a level to collect the stars.
The levels are fun and imaginative, and I spent far too much time playing this game :) Great stuff!