I asked my 10 yr old nephew how I could improve my chess/tetris game (http://chesstris.com/actionchess/) and he said "Could you make it a tower defense game?" I never thought to search for one already. hysterical!
pretty fun implementation of set. I've thought of doing this myself... but why only 2 min? Why not count up rather than down... see how long it takes to go through the whole deck? Penalize for wrong guesses... If you did it to hundredths of a second or something, you could subtract from a billion for the final score.
A decent 3D tetris implementation. All the controls are there, but I think I'd rather have them accessible all at once rather than CTR or SHIFT-ing all the time. Also, and I hate to say this the side-view just doesn't seem as easy to use as the top-down blockout-style original.