OK so in flash 8 using AS2, I wanna make a flash game with a similar style to Megaman Zero. I found a platformer tut ( https://www.youtube.com/watch?v=0SwLJXvsM48 ) however when I use the script he posted below, my character just falls clear right through the floor. I can move the screen, but he won't stop falling. I also found another tut ( https://www.youtube.com/watch?v=2IRACXwgzn4 ) but need a little more coding, here is what I need to learn:

How to get the character to STOP falling through the floor
How to give the character both a shooting attack and a melee up close attack
Jumping up against walls
Sliding
Breaking objects that gives you a HP (gotta pick up after breaking it free)
How to deal damage, both from the enemies and the character (keep in mind want to be able to have two attacks, one is shooting from afar)
A working AI, a enemy that moves in a pattern and a working boss with only 1 hurtable spot.
A level that scrolls as you move (Vcam follows you, want the player to use the arrow keys to move btw) but ends with a wall so you don't fall off.
A jump and fall animation and even a animation for when you land (so a script for jumping---falling---land)
Working player and enemy HP (altho only the player and bosses will have HP Bars shown, the enemies you can't see)

If anyone can help me with this, I'll be very grateful. Keep in mind I will have cutscenes before and after each lvl, so also need to know how to switch from cutscene to lvl and visa. Also a user messaged me offering help, but as that was sent months ago I'm not sure if he's even here still, if he and is and sees this will you know what all I need help with now.