I enjoyed this game, the aiming could be a bit tricky sometimes, but I guess it comes down to timing. Some background music would have been nice, but aside from that, I really enjoyed it! Good job!

I could find the exit button to quit the game. further it would be good to add some kind of feedback when I hit a truck/tank or other vehicles and get money a little bit faster per unit I destroy.  furthermore it is a fun game. no down breaking bugs so that is a good thing to have.

The gameplay itself is actually pretty fun. However, I stumbled on a major problem almost immediately, which is that there's no obvious way for the player to restart a level. I accidentally shot nearly all of my missiles before realizing they were limited or how to aim, so when I ran out of ammo, all I could do was sit and wait for a very long time as the enemies slowly marched across the screen.