Amazing work! Really made me feel like I was playing a classic shmup game at the arcades. You really nailed the aesthetics and style for it. The game had very good readability too with the way you designed the bullets and patterns.
Loved the interpretation of the theme as well -- very creative! I will say that it also captured one negative aspect of the old arcade games... if I had to pay a quarter for for every playthrough, this would have been an expensive one for me! It's very hardcore. 2 hits and you're out seemed very harsh as I struggled to even get past the first level haha. Again, the "consequences" were awesome, like the asteroid field one, but then I died even faster! I would have loved to have a few Continues at least so I could get a little further!
Had fun playing and getting different upgrades/obstacles to try out, that kept me wanting to play again. I really enjoyed getting the drone addon. GG!