I get where you are coming from. I have even received high praise for the quality of my code, but I still remain quite embarrassed when publishing it. It is difficult to not judge yourself critically, and feel that everyone is going to do the same.

However, I never find myself judging others the same way. I have stumbled upon some pretty great stuff by people who, in reality, are not anywhere near the top of their field, but it doesn't matter, it remains great regardless.

I think the worst thing that can happen is that nobody finds what you have published. Marketing is difficult, even for hobby work.