Well, your game dreams are certainly more interesting than any I've had lately.
The last one I can remember was a game of Space Invaders where every enemy you shot fell as blocks into the Tetris board below.
That actully sounds really cool.
[EDIT]
Thought about it a bit more, how rad would that be, every enemy you shoot down could in turn end up building up your defences. So the further you get into the game the more and more defended you get as you have to face off more and more enemies, not only would you need to kill the enemies before they get to earth but you'd want to kill them in the optimal area for your defence. Maybe if you fill up an entire line they still dissapear but you get an awsome bonus to make up for it.