Parents are safe with ZooCube. There is no questionable language, no sexual content and no violence of any kind.
Gamers in general will find a very average puzzle game that is neither terrible nor amazing. Some might want to check out the four-player option, but otherwise its forgettable.
Puzzle gamers might want to look into ZooCube if they absolutely have to play every puzzle game out there. It doesnt compare well to the bigger games of the genre, though.
Hearing Impaired gamers have equal access since there are no significant auditory cues, and the sounds of the animals arent integral to gameplay.