In the last couple days I've been working on learning flash, specifically with the Flixel plugin. Flixel is an open source library written in Actionscript 3, and seems perfect for 2d graphical games. I looked at several tutorials and didn't really like any of them until I found this one, which was really nice. Below is the completed tutorial.

Overall I'm surprised at how much extending from the Flixel classes makes building it. I'm really interested in digging into the Flixel source, however, to get a better understanding of what it's doing under the covers.