Pretty fun with solid controls.
I had fun defending the city strafing around in that hover tank, i like the spritework too, and the enemy hp indicated directly over their head makes it really clear to read without looking for info in a hud outside of the gameplay area of the screen.
If i had to nitpick i'd say some issues would be that some sprites are very tiny and thus difficult to see, mostly some enemy bullets and the player crosshair.
Appart from that, like i said it's fun to play, simple goal with solid gameplay.
Well done :)