This is a very primitive implementation of Tetris, written for Microsoft Silverlight and Adobe Flash.
IronPython version. The size of the resulting "control" (.xap file) is rather disappointing 1.15 MB, because if has to pack all scripting and IronPythin dll-s inside.
IronPython sources (~3 KB).
Boo sources (~3 KB).
HaXe sources (~3 KB).