There are two types of objects: Smiley - the main object and Brick which represents a single brick.

When the smiley moves upwards the background moves downwards. Bricks that go out of the screen are removed. A new brick is added instead of each removed brick.

Some of the bricks are moving and some of the bricks shrink when the smiley bounces on them.

All the sizes are scaled based on the device screen size (using percentage units).