Time to dust off the ol' nerd glasses for this one.
I gave Adam's abilities a quick read on the fandom wiki, I don't know much about the manga he's from but based on the wiki it seems as though he compares most closely to greek gods. If these gods are anything like their real life mythological counterparts, Goku surpassed their power long ago back in Z, and makes them look outright pathetic well before the time of Super. Even if he were to simply power up to full and throw a serious punch, it should be enough to kill Adam there and then. As it is, a weaker version of Goku in early Super nearly destroyed the entire universe with his punches. Likely, Goku would hold back the punch to avoid it being fatal however.