Moving the clouds
Our next enhancement will be to make those clouds, which are just sitting there in the air, move to the left. The idea here is to simulate some kind of wind property in the game world while each cloud will also move at slightly different speeds to make their movement look more natural. In addition to this, there needs to be a condition to let more clouds appear at the right end of the level. Otherwise, the game will run out of clouds at some point. We could just go the easy route here and spawn a huge number, say, 1000 clouds, but this is not very clever performance-wise, and this also does not tackle our original problem that is the game will run out of clouds at some point. So, a better approach to solve our problem is to keep the maximum number of existing cloud objects to a minimum.
Make the following changes to the Clouds
class:
private Cloud spawnCloud () { Cloud cloud = new Cloud(); cloud.dimension.set(dimension); // select random cloud image cloud.setRegion...