You are suppose to move the gray at the top-right corner to the blue circle position.
Drag the mouse to move the gray circle. There is a mirror image of the path you should follow.
When you click the mouse near the gray circle,  your score starts to count down one by one.
If your mouse move outside the boundary, more score will be subtracted.
Can you get score higher than 90 points?  Try it! It is fun!

Multiple Reflection from two plane mirrors
Mirror and images

Your suggestions are highly appreciated! Please click hwang@phy03.phy.ntnu.edu.tw

Author：Fu-Kwun Hwang, Dept. of physics, National Taiwan Normal University