Thanks for playing! I definitely agree the breeding logic could've used a bit more work.
For the mixer/breeding logic: the first item inserted copies a random property over from the second fruit. This means fruit order matters, and it can take a few tries to get the combination you're looking for.
In order to get mutations/new textures, you'll need to let a fruit sit in the radiation blaster until it mutates a new property.
I'm glad it was still fun and felt balanced despite the unintuitive bits, thanks again!