Cool little game. The quality of the presentation overall is off the charts. While I have some issues, it can't be said enough how much detail has actually been packed into this game.
First of all as I said before, the detail in the art is great. It's really impressive how many individual moving parts you managed to get on the ship in the first phase. That said, I also think it was almost too much detail at times, mostly because it hampered readability quite a lot. Since everything about the ship was that detailed, not much of it stood out enough at times, so I wasn't sure at first what was actually damageable and what wasn't.
Add the abundance of effects as well, and the enemy bullets which didn't really stand out enough from the background ( imo ) and it almost felt a little too chaotic at times. The red AOE attacks were definitely very noticeable though. I could hardly see the guy who'd spawn at the center of the ship and shoot rockets at me sometimes ( Probably just a skill issue though ). The second phase didn't really suffer from these problems though.
I think the boss's rockets could've been a little slower though, just to be slightly more forgiving.
All that said, I still think the fights are pretty solid. I think the main spin mechanic is also pretty cool, albeit somewhat loose with how it utilises the theme.
For something this short, it has a TON of quality packed into it which is both polished and fun. Great job on this