How to make a 2d game

[gpotw]

That's just unnecessary complexity added to an otherwise simple construct. There will likely only be a few different game states anyway.

[hanst99]

Unnecessary complexity? Hardly so. You are already implementing some form of polymorphism with the switch statement, you're just not using the actual power of the language to accomplish it.

[gpotw]

I'm all for wrapping up the switch into a nice AI class, but why represent individual states as objects? If the goal is extensibility and scripting AI then use rule systems instead.