And so I left, with everything but my sanity. I like the Risk of Rain nod there lol.
Excellent game, I love the visual aesthetic and how the music fades when the bullets spawn. I also really like how you incorporated different room sizes, which makes the gameplay and the dodging a lot more varied. The visual feedback and sound design is also really good, I can really feel the oomph behind those attacks. Having two difficulty modes is also really nice.
I would make the giant bullets a different color and put them under the smaller bullets. Especially in the tiny corridor room, it's really easy to get blindsided by a small bullet because it was covered up by the giant ones.
Overall, excellent job. I managed to beat lunatic mode, it was really hard but I had fun.