What is the general view on Satan as a snake? I’ve never been fully clear on this... was Satan actually in the form of a snake? Was he in the form of something else and then his form transformed to that of a snake which produced actual offspring? Was the snake species created to symbolize him?
I don't know what the general view is, but I will say what I think.
Granting there are other interpretations, I see nothing amiss or incredible about simply allowing for a physical (or apparitional) form taken by Satan that was serpentine. It seems to me that anyone arguing against it, shouldn't do so on the supposition that this interpretation defies common sense, or the physics of speech, or some other "rule" of spiritual convention.
As for divine judgment, Gen.3:14-15. People have an unnecessarily hard time with this. Mythicists think this portion proves the Bible at this place offers up a "just-so" story (ala Kipling). Fundamentalists often posit a "transformation" of the animal-form, because that seems to many of them a necessary demonstration of the divine curse.
The curse incorporates a sign. The sign is laid upon the creature that most resembles the form which the Tempter took. Delivery of the sign is the content of v14. The way God employs signs is this: typically, he takes a convenient object or emblem or place or persons, etc.; and then he
assigns a meaning to it. This item or place thenceforth carries with it that meaning
for those who know the sign.
So, whenever men see a serpent, from then on (assuming he knows what the assignment is) he is put in mind of the story of the temptation and fall. It has nothing to do with "fear of snakes," or the idea that these lizards "lost their legs" at some point. A biblical sign-assignment is not typically something that was never seen before; but something that never had such a meaning before.
The terms of v15 are directed at the Tempter himself, not the form taken. These are the words from which we have recognized the
proto evangelium, the first hint of the Hope promised in Scripture, the rescue and redemption of the fallen.