Congrats on the launch! I would say though I think you should up your price to at least $9.99. A $3 game makes me think it's low quality, which it's not. So you ought to price your game appropriately.
Strongly disagree. A price of $9.99 may seem “quality “ to you, but may be out of reach for many people (including, but not limited to, those who are not in developed countries). I’d rather have a lower priced item that allows people to pay a lot more at the time of purchase or perhaps a reminder (not annoying, and only once) to donate/pay more on reaching a certain level. A price of $3 may be an impulse buy for some…
Additionally, and perhaps perversely, much of a games sale volume tends to be generated during seasonal promotions (Steam Summer/Winter Sale, etc).
Pricing a game at $3 doesn't give you anywhere to go in terms of a discount.