It is a literal description, and the best description on how would a snake attack people and how would a bitten person, or simply a person, kill the snake.
You are welcome to provide an alternative description. I bet it will be worse and less precise than the verse.
Are you serious? Its hard to tell, but I will take the bait and assume you are.
For starters, it uses the same verb for what the man does to the snake as to what the snake does to the man. Do people fight snakes the same way snakes fight men?
Snakes don't bruise anything, they bite or strangle.
Additionally, if this is literally talking about people hitting snakes, and snakes biting people, what a completely anti-climactic build up. After this big story of the fall, the result is, "Snakes and people won't like each other."
What about all the other animals that humans fight with? Why don't they get a story?
Additionally, if this is the devil merely in the form of a snake, now God is punishing snakes because the devil happened to chose their form.
It also means that all snakes are descendants of Satan.
Yet what we have, as pointed out by another creationist in this thread, is a theme being created of two seeds: those who seek righteousness and those who seek evil, which will continue throughout Genesis.
And in regard to your last line:
"... and you will bite him on the heel." Is more accurate.
Unless of course you are talking about snakes that choke. I guess choke marks leave bruises. Come to think of it, I did see a national geographic on snakes that choke people's heels. Looks like bruise is more accurate.