updated docs

src/main.cpp

@@ -22,7 +22,7 @@
  * * Proxy - Lots of uses - one example is level loading -> game controller calls level class (data representation) -> that creates level_creator class
  * * State - Both shooting controllers - player can't shoot again until some time passes.
  * * Visitor - Processing of custom events
- * * Observer - ???
+ * * Observer - Technically event processing is using something like observer, but instead of observer I used Factory to create levels
  * * Command - SDL events are processed and turned into custom game events
  * * Memento - Game is able to remember it states and revert them
  * * Abstract factory - Class shooter_factory allows simplified access to both shooting modes