I like how the flying object sometimes Stop, and some make a U-Turn. Asteroids never did that! I did not like going off the screen where I can't see my ship. Nice work.
What is wrong with this game: 1 you can't outrun zombies with a truck?
2 you can't run over them, or knock them out of the way? Fix these and you have 5/5
You are NOT a tail gunner. You are a waist gunner in a plane on a parallel flight path.
It was difficult to determine who was the enemy because they ALL had green bars.
I thought the trailing small planes were escort fighters!
This is a "protect the fort" type of game. Well done, it works smoothly.
Like the others said, it need more guns/upgrades. How about starting a new mission with each new gun type?