[Bubbles] Create BubbleGenerator
[Bubbles] Remove unused resources
[Bubbles] Cleared game scene
[Bubbles] Refactoring classes
[Bubbles] Add invoking methods with sequence
[Bubbles] New Notification constant
[Bubbles] Change Order in Layer
[Bubbles] Add Score Label
[Bubbles] Add score script
[Bubbles] Fix memory leaks
[Bubbles] Add comments
[Bubbles] Add comments
[Bubbles] Add correct add and remove from pool objects