Hey! I think this game is really cool! It's amazing this is your first game, well done! As someone who is terrible at bullet hells, I appreciated that the ship fires automatically so I can just focus on dodging and parrying. The music and artwork were really good too!
I had just a couple notes for feedback. I realize maybe there wasn't enough time to add more to the game, but it would have been nice to have at least 1 quick level with normal enemies or a tutorial phase to give the player some time to play around with the controls and mechanics before the boss fight. I died a couple times trying to figure out how parrying worked, how I was taking damage, and when I'm supposed to charge the big shot. Once I understood that, I had fun with the game. Solid game overall!