By far your best work yet! Even when playing on a potato of a pc, the whole experience is so smooth and fluid all throughout. The only critique I have is that the hp drop for sword kill shouldn't be 100% for the first 2 levels (was gonna say in general. . .but Gamma is something else lmao). Speaking of Gamma, I am ABSOLUTELY charting it's song for something (osu! or Rhythia possibly), cause it goes way harder than it should (which is a good thing).
Also, how hard would it be in theory to make a custom level editor, cause part of me wants to re-create some og doom levels in this.