That a good start
Now, I'll give some siggestions about how to improve the episode 2 :
- Sound : You need sounds ! A flash movie is boring without sounds and some 20s music loops.
- Buttons : Add the missing frames on them spacially the click aera (the last one).
- Interactivity : Do as you want, add many paths or whatever, the idea is good. With a little affitional knowledge of actionscript, you can add a life bar and make the enemies shoots of whatever. It's a lot easier then it look.
Well, I hope this help. I liked the concept and you're not bad. So, please, continue.