Very cool! This was one of the games that I played the longest in the jam, I very much enjoyed it!
I got all the way up to lv 17 when the last enemy thought it would be a good idea to escape away over the ocean. I tried to hunt them down and managed to fly to a different island, which was a cool, but I never caught the enemy..
The art style is neat, but it would be even better with some stronger visual impact of the rockets and bullets. It's very satisfying to take down a whole cloud of bots with a missile and it would be even better with some debris and extra explosions. The upgrade system is very effective and satisfying as well.
Nicely done, I really like this one!