nothing is wrong with asset flips unless:
1. its being hidden
2. its put behind a paywall
the description says
"This game uses Epic's The Matrix Awaken's Project City and replaces the character with a flying superhero variant of my own design using other marketplace assets."
so right off the bat, we know that the creator is upfront with the fact that this is an asset flip
i was able to download this for free, so its not behind a paywall
so...whats the problem?