Blocks

The ball will bounce back and destroy more blocks.
There are two types of blocks: (i) the walls, grey thin blocks: you cannot destroy them, and (ii) the normal blocks: they change color as you hit them. The more red they become the closer you are to destroy them.
Caution: the ball accelerates over time after every bounce.
The difficulty increases as you pass to the next level. The higher the level the more block there will be and the more hits will be needed to destroy them.
At high levels blocks can move