Doesn't look bad for a first project.
You can score the spillway stones or just cant them slightly forward. They need not protrude that much to get the effect that you want.
My primary concern is the use of chicken wire. This WILL, over time, rust and disintegrate, discoloring the water and possible causing clogging problems in the basin.
More photos would help.
"Everybody is ignorant, only on different subjects." - Will Rogers