Also having nothing open source on GitHub was unexpected but understandable. It's ok to be private for a private company. It's just that the entire ecosystem is open source. A day may come when it's strange not to have code running on your laptop to be open source. But it's totally your call.
PS: you should spend some money on a designer. Too many margins and wastage of space in your demo app. And adding some polish could go a long way in adoption/fomo/conversion.
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Good luck!