The real power of this game is not the immediate ability of a more sophisticated player to get the concept, but the long lasting ability to learn from the experience. 5/5, deserves 6 if I could.
The music is totally what makes this game. I have never been so peaceful shooting down hundreds of planes killing countless soldiers of the opposing air force. So peaceful.
Simple enough, but the collision detection is a little screwy. Ideally a tetris game should allow for rotation in place so that players can "hover" while making a fast decision. It's not unlimited usually, but the controls don't seem to respond nearly well enough to play at higher levels.
ackbar, when you fight a wave, you don't get many monsters in it, but you can hurry a wave so that it appears sooner than normal. Getting a combo of kills means that you sent enough monsters at once that you've killed X amount of monsters before the screen was blank.
 "Loved"){kind=icon}
 "Epsilon"){kind=icon}
 "Enough Plumbers"){kind=icon}
 "Hedgehog Launch 2"){kind=icon}
 "Sydney Shark"){kind=icon}
 "War Machine"){kind=icon}
 "Even More Tetris"){kind=icon}
 "Run"){kind=icon}
 "GemCraft"){kind=icon}