If you like puzzle games that are a little unique and complicated, you should download and install this app on your Android phone or tablet. It is available on Google Play Store for free, so you don't need to pay a single penny.

In this Unblock Ball - Block Puzzle game, all you have to do is place the blocks in the way that the ball reaches the green goal block. However, the blocks that you are allowed to move are wooden ones. The metallic ones stay in place throughout the game.

This game has more than 300 levels you have to complete.