Digging the metal theme. Played with a controller.
Sometimes the menu bugs out (happens when pressing the back button on controller I think). Can sometimes select UI elements in the background, are you using Unity's auto feature for the UI navigation? It never worked well for me at least and only way I found to do it properly was manually setting it all. Had to Alt-F4 to get out of these situations:


Radio is cool, but sometimes it stop playing and I have to switch to get it playing again. Stutter when loading a new song.
No selected option UI marker for the ingame Esc screen.
Some objects that you can run into are really hard to see.
Some enemy hit sounds are very annoying, killing a lot at the same time can get very LOUD.
Rotten breath radius is sooooooooooo small.
Are there weapon combos that you can get and use into? A staple of the genre.
I don't mind the large screen border, but I know some players will. But I do wish there was some more space on the top and bot so the viewport isn't as wide. Stats that you can see in the pause screen could probably be on screen at all times, on the left?
I thought I unlocked all characters without paying, but it was just not updating the displayed gold amount.
Outline broken on Carpathia/Sabina:

Also saw some "elite" enemies that had some outline seperate from their sprite.
Blocker enemies are too weak.
It doesn't look like enemies are getting teleported as you get far away, which they need to. Especially important for elite/boss enemies. Right now it looks like you can finish a whole run by just running away. Hey there's actually a border for the map huh.
Surprised that there's no "stereotypical looking metal protagonist", like in Metalocalypse, Slain, Brutal Legend, etc etc.
I don't think you thought this graphic through LMAO:

(I know it's facing the "wrong" way, but still.)
I am impressed with the speed you can get all these projects out.