Hi!
First of all I just love the game. It's really awesome.

Playing it I've found some things that can be improved.
Red mutagens are really rare to find, so it will be nice to increase their drop chances.
Also I have 3 spare named red mutagens. I've already made those named potions, and have 3 more. But as they
are named, I cant combine them into more powerfull mutagen. Maybe it is a good idea to treat them as small mutagens, and allow to combine with other small or named of the same color.
Another thing noticed, when bandit archer stands near exploding barrell which is on fire and about to blow up, he just don't move trying to escape. Good idea to fix this behavior.

I will add more suggestions later, if there will be some.

Named mutagens are for decoctions. Unnamed ones are for improved mutagens.

If you enable named mutagens to be transmuted in higher tier mutagen, people would end up transmuting them by mistake and potentially lose the ability to create decoctions.

good point. then maybe enable these mutagens for transmutation only when decoction is already made.