This is fun, but it takes too long to turn for me to kill more than one enemy. Which is a shame because this could have been a very fun high score game.
Thanks for playing the game, I found yours to be very fun. Did you try double-tapping to rotate the cannon? That was a mechanic I implemented so players could shoot enemies faster. If you didn't, I encourage you to play again with the double-tap as it adds a lot of depth to the game!