When I put this much work in, charging a tiny/nominal fee feels like a barrier without a clear reason.
Younger users without payment methods and those on a budget will not engage with what you built.
At $5, the income stream has to be miniscule, so why choose a $5 license instead of free with donations?
If you want to make money on this, all the thrilled users you currently have would have likely paid 2x or more the current price, so if making money from it is the reason for the cost, $5 is confusing. But $5 is also confusing as a cost of entry to something that could be widely enjoyed at no extra cost to you, and might bring you something good in return if it was free and not paid.
At $5 a pop I can't imagine you're getting much of anything, including attention or widespread usage.