I released 2 preview files for my tower defense project. One is the source package, which includes all *.fla files and actionscript files required to build the second file, the actual playable SWF file (which requires Adobe's flash player to play back). You need Adobe Flash CS4 or higher to build the source package. More info and details on the project will be posted on my blog very soon.
This preview features a semi playable alpha preview of my code, named version 0.1. It is just there to give an impression of where i want to go with my project, it is far from finished, and most graphics and art has to be redone. So take this for what it is.