That’s a really nice project, I often thought of trying to do my own board to move project from breadboard to something permanent, and never got the motivation high enough to do it. So congratulations on your realization.
I must add, as a certified ipc-610 trainer that board gives me goose bumps, the Halloween kinds. (I’m just a professional critic, my projects are way, way worst)
It’s just the soldering. A drop of flux make wonders. The pwb is very decent, impressive even. You can be happy.