Screen Flow

I created a quick mock up the other day to give me a good idea about how many, what screens I needed and how they would flow.
So far it looks like I'll need 7 main screens in total:

1. Loading
2. Intro - (pre-rendered?) Movie and/or credits
3. Main Menu - Others that show up on the main menu but not whole screens, just dialogues:
• New Game Skill chooser - Hard, easy, etc
• Load Game
• Options - Needs to be independant, so that we can replicate it in the in-game menu
• Rankings / Graveyard / Highscore board
4. The Game
5. In game menu
6. Finish Game - Screen that shows when you finish the level:- briefing, Next level chooser, etc
7. Buy Now - when the game is quitting shows this screen for 10 seconds before closing.

So far I've done 1, 3, 4 and 5. I've not finished any of the screens I do have and some like the main menu I'm not happy with and will need to be redone from scratch. None of the sub screens from the main menu are yet done.

I need to get rid of the test sreens I've got in; I was using these to test the engine. I then need to put in some skeleton screens in so I know how things will flow, even if these screens consists of nothing but a simple picture or the text "Intro" on it! Once the skeleton is done, I can begin to flesh it out and build up some better looking and more functional aspects.