Needs work
The first suggestion I have for you is to improve your loader screen. Put the word 'loading' (add eclipses maybe [...]) and create an engaging background to the viewer...preferably black or a cool colour such as blue. The flash really is not effective when I see a white screen with a back outlined button with the word 'play' in the centre. Imrpoving this will keep viewers attached to your flash.
The same suggestion goes for your menu. A user friendly menu (one that engages the reader) is more effective and easily liked. I was happy you included music (Crazy Motorcyle Chase is an interesting composition). Calmer is also effective too. Work on your background for this menu and make the buttons more user friendly.
The next suggestion I have for you is to change your resolution. Make the width bigger than the height as flash are more effective in this format - like movies are at the cinema.
The final suggestion I have is the actual tutorials themselves. An effective tutorial holds various styles of learning which the reader can assosociate with. Some can read from a book where otheres rely on images (like me). Put some screenshots of the flash work and stick them into the flash so learning animators are able to grasp where they can change the frame rate, where they can modify the Action Script and such. You must also remember that not everyone has the same version of flash, so this is why imagery is needed at times. My final suggestion goes for when you click the buttons. Remove the sound effect that follows as this makes the reader less inclined to hold an interest in the flash.
Overall, it was a good start for a tutorial flash, but a lot is missing. Work on what I have suggested and I hope that you can produce something more powerful in the future.
