EDIT: DAILY 4TH!?!?!?! I LOVE YOU NEWGROUNDS :3 Tutorial collection too! Thanks Tom :D!
Wow. This took a while. You'll see what you mean when you see how much detail i've put into this and how many frames. My proudest work to date. This covers:
Movement
Gravity
Floors
Doors
Walls
Enemy AI
Attacks
Health And Items/Powerups.
Sorry about being weak in enemy AI, i'm not very smart in it :P. Right click for options, and enjoy - I put a lot of work into this :)
EDIT: Added Flash API - be sure to click the ad for me ;D. I like moneh :D.