Good, but not great
This isn't bad, but you can do much better.
Indestructotank was great because it was so unique. Nobody else thought of a game in which you bounce a tank from explosion to explosion.
By contrast, Indestructocopter is almost a TOTALLY average first-person shooter. I do give you props for making a flash shooter interesting, (via the time-delay on the guns), but it's not a unique experience. Keep thinking outside the box, man!