It's nice to see an original idea for a puzzle game. The implementation is nice and clean. A few more or more difficult puzzles would be nice, maybe in a future version. 5/5
Let's not forget that by the time you get to level 50 on General, there are so many tanks firing at you from so many different directions, even a perfect player could not win. You just have to wait to get lucky, essentially. It actually looks like there might have been an attempt to make sure only one tank is firing at a time, but because the different shots move at different speeds, this doesn't help.
 "Hands of War Tower Defense"){kind=icon}
 "Blox"){kind=icon}
 "Shield Defense"){kind=icon}