A* Path-finding

I was used A* Path-finding to let the avatar walking in the shop.

Before I use A* Path-finding, I was just let the player walk straight. But the effect is not good enough, than I try  to find another methods to solve this problem.

I research for the path finder through the  internet, and then I found the A* Path-finding in AS3 version. I was study for long time on it.

Here is the testing file of pathfinder