The story is interesting but there isn't much of it and I am REALLY not sure why you chose to use Unity; it really seems like overkill for something like this. I was expecting there to be an action, or at least interactive, sequence, rather than there being two (really only one) "choose an option to move on" points.
I hope the size is for music (which... honestly ... I didn't even listen to) and it can be reused because otherwise by the time you've got something resembling a full story it will be monstrous in size.
Herr EU is a little cartoonishly villainous which makes me wonder: is the Mayor in on it, or just really really stupid? Kind of disappointing that we don't get to find out.
Would have appreciated the game not moving on from the initial quote on its own. I speak nur ein bischen Deutsch, so hadn't finished interpreting it by the time it went away, which is the exact opposite of the problem I have with most text-based stuff (in English).
I did appreciate "childhood friend *girl*" as a good compromise for the lack of gendered nouns in English, but might suggest "childhood female friend" or more colloquially "the girl next door".
Why did you not translate "Mother" and "Father"? It was a little puzzling that all the text except that was in English.
I personally prefer that a game either have nudity or not, not try to straddle the line with censorship. Did we really need to see her pixelated genitals?
In short: interesting story but not enough of it and please lose the censorship.