Newgrounds Tetris Project ...
Hmm, I'm not too sure about this one. Firstly, if you made the tetris engine yourself using Actionscript, then you obviously have a lot of talent for programming in flash, but something tells me you downloaded the source from Flashkit or some other site, in which case, not so cool.
Either way it looks like your quite excited about the project, so carry on and do the best job you can. I'd really like to see themes from different animation series on NG, like YAFM, Joe Zombie, Salad Fingers, #cough# Kommando #cough#. Make sure you get the authors' permission first though.
Personally I've never really liked Tetris for some reason, but this looks like a reasonable start to your project.