Without the sun, there would be no life on this planet. But according to Genesis, there was. This is a big reason to dismiss the Genesis account
According to theists he can do all sorts of cool shit.
Yet seems 100% incapable of doing so.
The mana account is an excellent example. If he can do it once what is the issue with doing it repeatedly? No normal human father would see his children suffer needlessly if it is within his power to stop it.