Purple Void by mochakingup 2018-08-14T23:23:38Z
I loved the look of this game so much that, when I realised I didn't catch the name of it, I spent about 20 minutes scrolling through blog posts until I found the screenshot I recognised.
That aside, I love the music, as I think it matches the art style just right, and it generally looks fantastic. It was also a lot harder than I expected. The boss's hitbox is a lot smaller than I expected it to be when shooting, and I think a great addition would be some invincibility frames after getting hit, as I found myself getting immediately destroyed when the boss used its ranged attack.