You need to learn how to use flash, which will most probably take a while so I don't think someone is going to tell you exactly step by step.

I know how to use flash. I make movies all the time. I just want to learn games

Well they're made from flash, so you just need to learn interaction stuff in it. Try the help section of flash, that has some simple tutorials.. or do a search on flash tutorials.

What kind of games? There are a multidude of genres in the world of gaming, even among the select few one can create with Flash. The VERY basics of designing a platformer style of game in flash can be found here: http://www.newgrounds.com/portal/view/288588

While other tutorials can, of course, be found at Flashkit.com, or more specifically: http://www.flashkit.com/tutorials/Games