The good news is that indeed many companies nowadays would show interest based solely on a GitHub project. But you do need the ability to finish things off.

The truth is that many of the bigger coms out there have multiple requirements, and will care more about your degree, problem solving ability and familiarity with formal computer science. Perhaps because they get so many applicants, they need to rely on metrics at some stage to cut down the bulk.

Even so, these things are worth knowing anyways and, speaking from experience, you can pick them up comfortably outside of a CS degree.