Nice! A fun, retro boss fight. I loved the art style, and it was fun getting to know the attack patterns.
The only thing it was missing, for me, was a health bar for the boss. I played a couple of dozen times, but gave up eventually, because I had no sense of whether I was remotely close to winning. The health bar can really help create that 'just one more try' feeling.
Thanks for letting me play this!