Beautiful art direction !
Both the main menu still, and the spritework look amazing.Music wise i like the discrete very chill tune, it kinda helps keeping calm and focusing on finding your way through the patterns.
One thing that confused me a bit at first was the fact that you don’t start shooting imediately even when you have the energy to do so so at first i thought you couldn’t shoot at all, once i got around that tiny hurdle the controls felt fine, one thing though is that when the boss starts shooting some of the more complex patterns (about around 50s left on the timer) the performance slows down to a crawl :(
Aside from this setback the game some solid elements already there, would be cool to see what a full version would be like with the optimisation issue solved.
Regardless you did good :)