This is a really fun game! Once I got in the groove I enjoyed myself a lot, the music is really fitting! The flashing light on each missile is a fantastic choice to make sure they are visible even in all the smoke clouds!
Once I got two rocket launchers the game's challenge disappeared, but I had fun. If you expand on this, I'd add a few sound effects. A really meaty sound effect on destroying missiles would feel really good.
Awesome job!