But what would be godly verses just highly advanced?Such as actual gods being seen doing godly things as a matter of routine.
Basically the same things that make people confident in the existence of real things in the real world. I know my dining table exists, because my spaghetti doesn't land in my lap.
I know gods don't exist, because theists have to eat off their knees.
"Actual god" versus "just highly advanced" = semantic issue.
A "God" is merely a being or power that's super-duper impressive to those who want to worship him/her/it. Call the conjectured power or being "advanced" instead if you like, but if the worshiper calls it "God" then that's how... and is the one and only way... to determine that it's a deity. It has to be someone's deity to be a deity.
So, could the OP's scenario convince me it's God? If I valued the noise 'gawd' as an explanation for anything, then Yes. But I don't, so No.
"Is it a deity?" is not a problem you can solve like an engineering issue (what is it? what's it made of? how does it work?). Instead it's a question of values. Do you value the word "God" as meaningful? Do "sentient" and "very powerful" and "incorporeal" and "deserves worship" seem like they all fit together in your mind? If not... if the values aren't all there (maybe especially if the "deserves worship" bit is missing)... then probably "advanced alien being" is what your more science-informed sensibilities are going to make of a powerful incorporeal being that can make you believe it exists.