Detail-wise it's a nice one, but as a real bridge it's a complete disaster.
When building bridges, make sure you decide what kind of bridge would you like to do (suspension, truss, beam, arch, cantilever, cable stayed)
You should also study this
Wikipedia article, and don't really mix bridge types.
The pillars have no real support, which would definitely result in a collapse, and that's something unwanted.
3/10 if you ask for a rating.