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Never, ever be embarrassed with how long a work of creativity takes you. Most of these weekend projects you see on HN are simply minor derivatives of existing ideas or twists on web API usage. The implementors usually work with the involved technologies on a daily basis and have built up a decent body of knowledge before attempting a "weekend" project.

The old adage of the artist/locksmith/doctor/plumber/whatever that can create a new work or fix your problem in 15 minutes stands up. It didn't take them "just 15 minutes". It took them N years and 15 minutes.

Edit:

Let me add that you made a product. You didn't just throw a project out there for other hackers to gawk at. You made something to sell. Something that requires the polish and preparation that creating a consumer product demands. This is more work than can reasonably be done in a weekend, a week, or even a month.

Bravo.